The physics and interaction are surely the strong points, but the open world per se is pretty barren, with limited and scripted npcs interactions, an extremely simple animal ecosystem, almost no interesting loot to find, copy paste dungeons and goblin camps that are super easy to dispatch and almost nothing more, and let's be honest, the graphic is soo poor that even the most interesting locations are pretty bland, lush super saturated coloured grass can only get you that far...
If we talk purely about the open world and you put the open world of botw in a game that has no zelda in the title nor the physics\interactions, it would be a shit open world game.
You put the open world of rdr2 (or other titles) in any game, the game automatically become better.
I know it's a bit of a stretch to separe the OW from the core mechanics, but you get what i mean.
I mean sure you can find a dragon and some random events here and there, but nothing that kept my interest high (mostly because what you get from these events is usually useless uninteresting crap)
And before people start attacking me, horizon 1 was my past gotg and i think that one has a shitty open world aswell, it has vastly more interesting enemies\lore\panorama (thanks to the graphic) but it lacks the interaction of botw, a way worse level design and it has equally shitty and poor random encounters etc.