I'm not saying that we don't need well educated zoo-keepers. I'm saying that we definitely don't need over educated zoo-keepers.
A zoo keeper is a carer. Their function is to do all those things for an animal that it can't do for itself - feed it, clean it, protect it from the elements, protect it from other animals, protect it from humans, watch over it for signs of illness, calm it at times of stress etc, etc, etc.
So, a good zoo keeper will be sensitive, have a good work ethic, be impervious to extremes of weather, will be able to put animals before self, will have good powers of observation, will not watch the clock etc.
None of these can be taught [nor are they taught] at university or college.
On the other hand, we find that students who complete three years [in Australia] of advanced education have the not unreasonable expectation that they will not have to start at the bottom of the ladder with a shovel and a rake. They, quite rightly, feel that their degree means that they are better qualified than their not so well educated colleagues and so don't have to perform all the tasks that I listed above.
It is my contention that, while these people have a role to play in the operation of zoos, they are not zoo KEEPERS.