Dude I live 10 min away from this place. Those cats have room, they arent walled in to their shoulders. Sure everything would prefer to be running free in it's own preferential Valhalla, but I've never heard a whine, moan or complaint from any of them cats. And ALL of them are vocal enough to let you know EXACTLY how they feel. The domesticated cat is actually rather quiet in comparison to most of its larger cousins.
And regardless, it's a sanctuary. Every cat there is the result of someone getting an exotic pet they couldn't handle, so the choice becomes
Cat goes to sanctuary or cat gets put down.
I understand your animosity towards the reality of it, but place it on the people who started the shit cycle, not those trying to lessen the suck.
On the flip side, every species that allowed itself to be domesticated is now at its highest population levels in all of history. There are more cattle, dogs, cats, chickens, sheep, etc alive today than ever before.
Yes, there is disease that will jump species and that sucks but that's just life, yo. Even with those that died from that, across all specific species in relation to man, every single species had and is still better off for the arrangement. The stories can be told in the sheer numbers alone.