That's exactly my point, climbing animals are naturally comfortable while climbing, so welfare being constantly at a maximum should correlate to them climbing to match that status.
It's very much a chicken or the egg situation really. Climbing animals are only comfortable whilst climbing; so there's a climbing need that needs to be met for them to be comfortable. If you take that need away, they don't need to climb to feel comfortable so they don't do it. (Frankly, that's even realistic to some great apes in real life in zoos lol)
I do somewhat get what you mean, but I think your issue is not with the fact that animal welfare is tied to climbing (or broader, tied to enrichment as it should be); but more that disabling animal welfare just diminishes the animals in general because everything is needs based. But frankly that is more of a problem with how disabling welfare works in this game and because of the fact that it was added after the fact rather than at the start.
That being said, it's not that the animal
only stays on the ground of you turn off welfare completely; that's also not true. That's where the exploration based climbing comes into play, which was increased a few updates ago. But once you turn of welfare completely, you basically fulfill the needs of your animals all the time so their incentive to do stuff is gone, so the enrichment based climbing doesn't seem to happen hence why they climb less.
So I disagree with your notion that it is shackled, it's for instance less shackled than it was in ZT2 where climbing was just completely tied to enrichment needs. It just a multi layered system, which in itself is good, but is thwarted by the welfare disabling that was added later to the game.
Anywho, the point of my original post was for those who want to see an animal climb more; not to start an entire discussion
