if you call everyone dude and a transfem person gets mad about it, don't get defensive. just say like "sorry, i won't do it again" and don't argue "actually it's gender neutral" or "i call everyone dude". even if you do, i guarantee she's heard that argument from someone who very much does not call people they see as women dude. i certainly have
same goes double for the word guy.
I used to default to calling everyone dude unless they say otherwise. I call my sisters dude. Recently I have learned this is bad.
Luckily I am not a giant baby so it is nbd. I have resolved to not be like a boomer and let my language evolve without complaining
Side note I can understand why people may not want to be called dude. I hate being called "sis" or "girl" by gay dudes, it is both weirdly affirming and incredibly dysphoric all in the same package.