Don't like sports but have never been a fan of this take. It feels indirectly homophobic (in that you're saying something that you know is not sexual in nature is gay because you know the other person will view it as a negative or bad thing) and would probably not be taken as much of a joke if it were, say, a gay man watching women's volleyball and their straight friends harassing him about actually being straight.
Just my two cents, I'm sure it's fine in the right circles.
It really depends on what you want to use it for. I have the skills to make decently complicated parts to print, but 9 times out of 10 I'll just see if someone has already made something similar and use that instead. If you know you're gonna be prototyping a bunch of things or testing weird shit out then yeah you should probably know how to operate a CAD program, but if your use case is, "this plastic thing on my very common appliance broke, I wonder if I can print a replacement?" or "these little flexible dragon things are cute" then you just need to know how to use a search bar and your slicer.