It's just like with every other company to me.  Development time takes too long because of the complicated nature of modern game development and devs are typically put on a deadline, so a lot of their significant ideas are left on the cutting room due to time constraints and are repurposed for use in DLC.  The only difference between Nintendo and other companies to me is that Nintendo typically gives their devs more time to complete their games so that there typically is less of a need for significant DLC.  In BotW's case, I'm assuming that the game was so massive that there were a lot of ideas that were unimplimented due to time constraints that Nintendo decided to repackage the most significant ones as DLC.  I'll admit though, if that hard mode is just increased stats or some other bullshit, I'm going to be really disappointed.

So a cop out then? Okay.

Kresnik said: https://www.nintendo.co.uk/News/2017/February/Nintendo-prepares-downloadable-content-for-The-Legend-of-Zelda-Breath-of-the-Wild-1191606.html 14th February, 2017 – The Legend of Zelda: Breath of the Wild for Nintendo Switch and Wii Uis one of the largest, most engaging video games Nintendo has ever created. While the main game offers players an engrossing quest that will keep them entertained for hours, as well as the freedom to explore the vast Hyrule at their own pace, the game world provides a rich canvas that offers the opportunity for additional adventures. As a result, the first-ever downloadable content for the mainline The Legend of Zelda series is in development. Starting when the game launches on 3rd March, players will be able to purchase an Expansion Pass for £17.99/€19.99, granting access to two new sets of downloadable content for the game when they become available later this year. Immediately upon pre-purchase or purchase of the Expansion Pass, three new Treasure Chests will appear in the game’s Great Plateau area. One of these Treasure Chests will contain a shirt with a Nintendo Switch logo which Link can wear during his adventure, exclusive to the Expansion Pass. The other two Treasure Chests will deliver useful items. The first content pack is scheduled to launch this summer and will include the addition of a Cave of Trials challenge, a new hard mode and a new feature for the in-game map. The second content pack will launch in Holiday 2017, and adds new challenges that will let players enjoy a new dungeon and a new original story. The Expansion Pass will be available for both the Nintendo Switch and Wii U versions of the game and are identical. Content packs cannot be purchased individually. “The world of Hyrule which we created for The Legend of Zelda: Breath of the Wild is so large and vibrant that we wanted to offer more for players to experience within it,” said Nintendo developer Eiji Aonuma, the long-time producer of the series. “With this new Expansion Pass, we hope that fans will play, explore and enjoy the game even more.”

Add this picture in OP

You're probably looking at the mainline Zelda series as some kind of pure virgin; untainted by modern business practices.  You'll probably feel the same way when Nintendo does it with Mario Odyssey.  Strangely enough, I don't think I'll feel this weird about DLC when Nintendo eventually does it with the next Metroid Prime game -- I guess maybe because the series itself has always appealed more to western fans and modern gaming business practicies were created/popularized by the west.

There's also the alternate theory of why you were okay with it in Smash or Mario Kart, which is that those two games are extremely dependent on their online communities for a full expereince so DLC seems like a natural thing to keep people playing those games and maintaining lively online communities.

Well, it's more than just time constraints. Time is money in game development, and the longer a game is in development the more it'll cost. Probably also a matter of budget. Easier to justify something like that if you can sell it.

And yeah, that would be disappointing.

I was expecting to have DLC since time ago, but I was hoping for sidequests and dungeons.

Gonna buy the game as it is and enjoy. If later I find the new hard mode, story and dungeon worth to add I'll bite. But I think the launch version will be more than enough for a long time.

That's Fantastic news!

Well you linked a post from a 17 month old thread with nothing explaining why or any kind of question or statement for me to even reply to.

The Jimquisition video I linked was on a different topic of pre-order culture of pushing DLC way in advance of the games release and setting up pre-orders for said DLC which was a little over 8 months before the game actually released, This season pass in this thread is announced just over 2 weeks before launch and isn't avaliable to buy until the launch day. 

I though it was kinda funny/ironic that the first thread in the hot topics section after watching the video was about pre-ordering a DLC for a game not out for months.

Really, your proof is a spinoff fighting game.

But let's say your proof works and Nintendo game do drop in price. This game would be an exeption for the sole timing of the games release.

In 6-8 months it will be the Swtiches first holiday season. They are going to keep their big game Zelda at full price. It will need no price cut to sell during the holidays. If anything there will be a holiday zelda bundle. But you claim you are buying switch day 1 already, so that would not benefit you.