I can see your points.. and partially agree. The release to the wild should be "Send to rehabilitation to the wild" because that is actually a thing, and I sort of imagine that's what happens already, but yes true, that should be adjusted towards reality too. For example only young animals should be releasable like 1 year after they matured.. or something like that..
The acceptable break from reality does make some sense too... I would like to think that eventually there won't be any Zoos with animals caged up, just virtual reality ones, that you can walk around in with VR googles, and the animals don't exist until you put them in your Zoo also makes sense this way, but then why do we need to breed, why don't the animals have perfect genes? To me it ruins the "Reality" from the concept of Virtual Reality and Life Simulation which I believe is what this game aims to do (not there yet, maybe it doesn't even aim to be perfect, but its a start for technology to advance that way).
And I agree on the Polar Bear space requirement being weird, it could either be reduced or have arctic wolves live with them.. they live in the same areas in the wild, and only attack each other if they are starving.. which hopefully won't happen in the zoo.