Earlier quoted context omitted.
I got bored quickly of BoTW, not so Elden Ring. I think because there was so little to do in BoTW.
Elden Ring has far less variety than breath of the wild. Unless you count killing things in different locations variety. https://youtu.be/9EvbqxBUG_c This video gives a fraction of some of the interesting world interactions and enemy ai that I found more enjoyable as a game. You can interact with chests, doors, and levers and talk to people. I think that's it outside combat.
I think it's more about the variety that one cares about. I love both BotW and Elden Ring, but I could see either one 'lacking' somewhat in variety depending on what I choose to care about more.