It's not like the shrines are literally the same. Aside from the ones that are just fights, they all have unique puzzles despite having the same visual aesthetic. They're rewards, even if you didn't think they were compelling enough. And this is coming from someone who never finished all the shrines or not nearly all the Korok Seeds.
Them visually all looking the same is what makes them so bland for me. They reuse enemies and mini-bosses too.