Yes, I understand your point, too. But there was a time when scientists studied just for the sake of learning. The overall goal was always to learn all there is to know about everything - about the origins of our universe, about the beginnings of life on earth, about why humans and animals behave the way they do, about what humans themselves can create, about how we can affect the course of events, and so on.
It was the fascination of learning that drove them - not any particular purpose. And the result was the gathering of facts that became useful, not just in applied science fields, but even in our everyday lives.
What I want zoologists (as well as scientists in all other fields) to do is to keep gathering the facts - and as the facts are gathered, make them known to everyone else. Others can then apply the facts to problem-solving.
And, because zoos have the best resources to study animal behavior, I want them to focus on zoology (without harming the animals in any way).