Getting 100% in Breath of the Wild is no easy feat.
Sure, completing the four Divind Beasts and Ganon isn’t too difficult and even finding/completing all 120 Shrines is not that hard of a feat.
Once you throw in the fact that you need to find 900 Korok seeds and discovering every location, no matter how big or small, you’ll realise just how long it’s going to take in order to see that sweet, sweet 100% on your map.