Why hasn't anyone domesticated hyenas?

Wild animals don't seem to adapt to the urban environment.

Those wild zoos are in real forests and need someone to lead the way so as not to be eaten.

After domestication, the wild animals in the zoo have all become artificial breeding, and their basic functions have deteriorated.

There is a joke that two leopards were saved by three wild leopards in the circus. After the two leopards were rescued, they asked, what should we do if we are hungry? All leopards hunt by themselves. They asked this question, which puzzled the three wild leopards. They replied: hunting by themselves, of course. Later, two leopards said that there was no keeper to give us food? Suddenly, three wild leopards fainted and immediately said, depend on you!