As a gamer I prefer the strategy on pc, ps4 and xbox by s country mile. It means I can buy a shit ton of games for less money. Over the last 2 months I've bought about 10 games for about €10 each sometimes less. I bought spiderman deluxe on sale from €80 for €50 under 2 months after release and I bought RDR2 + Spyro trilogy at launch with $15 cash back thanks to a psn ptomotio. So basically both of them for $85.

Unless you are a philanthropist, you should want the model seen on pc, ps4 and xbox. More games for less money.

The difference is day-night?

Games move regardless, even if some have much better legs than others.

Nintendo relies heavily on SW sales for profit, while most other gaming companies don't. Sony gets a ton of profit from PS plus, MS XBL, Activision DLC and Blizz subscriptions, EA DLC, T2 from GTA online, etc etc. Nintendo recently tried diversifying by launching Nintendo Online and offering small snippets of DLC.

There are some games like GTA and Red Dead Redemption that hold their value just like Nintendo, but even then Take 2 can decide to drop the price or bundle their games to push their big money making strategy with GTA or RD online, Nintendo does not currently have that fallback strategy.

This is why I buy far fewer games for Nintendo systems than I do for the others.  At $15 or $20, I'm often willing to take a shot on a game that I'm not crazy about.  But, I never drop $60, or even $50, on a game unless I'm nearly certain I'll enjoy it.  That means I only buy a couple Nintendo games per year, while I may buy 10 or 12 PS or XB games.  

Competition.

Some people that have Nintendo don't understand how life is in places like South America for example, something that Sony and even Microsoft does. Instead of becoming competitive here they just choose the elitism approach which is very sad. They don't even release games here anymore while PS4 and X1 games are released even with subtitles in portuguese. I have a P4, 3DS and Switch (that I bought while I visited my brother in Canada last year) and quality wise there is no reason for Nintendo act the way they do. Their games are not better. I loved "Breath of the Wild" and and "Odyssey". But I loved Persona 5 and God of War way more and they are not 60$, a game like Mario Party being $60 really makes me laugh to be honest.
Games should be enjoyed by everyone and even though I will continue playing Switch next year because of their approach I will play way less than I could have.

Short answer? Competition.

Long answer:

If someone bought a NS say, this time next year. You can pretty much list out the top 7 games the person can or will buy right now. Now since there are very few must have  games to chose from or more specifically fewer publishers offering must have games on the platform, nintendo pretty much has a monopoly on their library. The know that anyone buying their platform is going to buy (the usual suspects) mario, mario kart, smash, zelda.....etc. The same group of best selling games on every nintendo platform. So the only reason to drop their prices is if their sequels are released on the same platform.

Its also a way of forcing the hand of their buyers. Take me for instance, I have not bought either detroit or spiderman yet, because I have a backlog I am still going through and I know that by the time I am ready to play them sometime in march next year they will cost less. Hence it makes zero sense me buying it now and having it just sit in my hard drive till next year. Nintendo buyers don't have that luxury. You might as well just buy the game now cause its price is never coming down. Meanwhile when I am ready I will probably get both games for $60.

Yes. Nobody invests tens of millions of dollars for a game, and will simply sit and stare at other's new games overshadow it a week after launch. 

The Nintendo consoles have a lot less multiplats and there is a reason for it.