Let me clarify: I think people should be able to become philosophers, just like they can become mathematicians. But I’d advocate for changing the undergraduate curriculum - move proof-based mathematics into a targeted graduate degree, and emphasize computational mathematics like calculus and (linear) algebra, but make them core components of a much more generalized degree. Add in language and logic studies that borrow significantly from philosophy.
With very few exceptions, you’re not doing research mathematics (i.e. being a mathematician) without significant graduate study. Similarly, for majors like philosophy that are “watered down” until graduate or postgraduate work, I don’t think they should be eligible for targeted degrees at the undergraduate level. This would have the added benefit of 1) delaying time to major decision for college-aged students and 2) keeping their options open for eligibility to targeted graduate degrees later on, by limiting the number of prerequisites. You don’t need undergraduate number theory to do well in an early graduate number theory course. The 300 and 400 level philosophy courses you take in an undergrad setting will mostly not have value on paper, so in my opinion we should shift them to the degree that has value on paper.
But at this point I’m pontificating about the education system, not philosophy in particular :)