One reason it may be attracting downvotes is that the actual question is not stated in the body of the question, but only in the title. This is frowned upon by many users.
Another reason is that you seem to be expressing your opinion rather strongly: "I'm not convinced that there are many (any?) practical results that require it." This doesn't sound like someone who wants to learn something knew; it comes across as almost like a challenge: "Spend time answering my question, or I win the argument and all my critics are wrong." So perhaps phrase this in a way that sounds like less of a challenge, and more of an earnest desire to learn something new. Like: "I haven't seen any practical results that require it, so I'd be especially interested in examples of this kind of thing. Conversely, I'd be interested in books/articles that argue that no such practical results exist."
Another issue is that you confound utility with practical necessity. An axiom can have theoretical utility without being essential to building bridges, if that makes sense. If it simplifies the theory without giving incorrect results about bridge stability, airplane speed limits, etc. then what's the harm? So I think you accidentally opened a philosophical can of worms. I'd suggest rewording the question in a way that is more philosophically cautious.
Yet another reason you may be getting downvotes is that I'm SURE this question has been discussed on this very site, or at least that similar questions have been. But your post contains no evidence that you bothered to look over similar questions before posting. Try to research questions as much as is practical before posting your own.