I think that is really well done from Nintendo. I couldn't care less about achievements or trophies, especially all the stupid "find x items for nothing" collectables.
Honestly that reward is a slap in the face to ppl who go out of their way to collect them all.
Apparently this isn't even needed.
Originally Posted by Octavia
I think the moral of the story is to not have 900 of something just 'because' and to have a more reasonable number where every one of them has a meaningful and enjoyable gameplay method to finding and acquiring it.
If there were "only" 100 Korok seeds and you needed all of them to max out your inventory, it would be far worse for people who want to maximize utility (instead of just their completion percentage) because they'd have to literally use a guide to find all of them.
As it stands, you need to collect roughly 50% of all available to max out all of your inventory slots, maybe 10% (~100) to have a reasonably big inventory. (with 100 seeds you get like ... 8 extra weapon slots and 3 shield / bow slots each or something similar)
It's great design that there's so many of them that you're going to accidentally discover enough by simply roaming the open world, seeing how much the game revolves around finding your own 'path' throughout the open world, exploring undocumented areas of the map.
The fact that the reward for 900 seeds is a useless piece of non-equipment is actually a statement made by Nintendo: "You do not need to collect all of them. You're not meant to. There's nothing worthwhile you get for collecting all of them."