And it's more than just you "choosing" to be a male nurse. Sure, you love it because yada, yada, yada. Deep down inside, you're probably a beta male with some deep seated insecurities about your inadequacies as a male. Probably got raised by a beta male dad who failed you as a parent. Sorry you had to end up in a female profession.
I shouldn't care, but I do. It doesn't impact me, but I'll make it my concern. Gender stereotypes shouldn't matter in your case, but they do for others.
I guess it's different when the shoe is on the other foot.