Why do mathematicians make such a big fuzz about the philosophy of set theory? All mathematical fields face the same kind of philosophical "issues" and the struggles of set theory are not unique in no respect. In fact, more complex fields

Say an undergrad student starts to study set theory. If you just keep throwing rules and assignments for him, he will never even think about wasting time thinking about the meaning of a "set", for example. It's entirely the professor's/lecturer's fault for even bringing such frivolous unnecessary topics on the table.