Except I never actually say "females" specifically to them? It's just everyone is so fricking touchy these days that if you call them a girl, they freak out, call them women, they freak out. Call them anything, they freak out. Example? This right here, you're complaining I used the word female. Just like if you're online and you don't have a clue on their gender, most people default to "him" and "he", especially if that's the gender of their character, then that person proceeds to flip the frick out, because they're not a guy.
It's almost as bad as when someone says "you" and thinks you're specifically targeting them when you're using the word as a general group of people.
And it's actually more women I've seen use the word friendzone, specifically at me, so yeah.
tl;dr - People are way too touchy and sensitive these days and need to grow up, rather than flip out on the word you chose to use. It's going to get to the point soon when it's safer to just not talk to anyone because they'll flip out for no reason.