Preferred pronouns are the real snowflakery.
With very rare exceptions, people code as male or female to others. We have pronouns for that.
When I refer to a male as "he", I'm not referring to how he envisions himself inside his own head. I'm referring to how I envision him in my head. And how you envision him in your head. Even if you acquiesce to his preferred contra-sex-coded pronouns, you're still aware of how he actually codes. Otherwise, you wouldn't have to think about preferred versus actual pronouns. You'd just use the one that's already in your head, alongside your own sense of him as male.
Demanding that you dismiss your own sense of the world, and replace it with theirs, is an act of oppression. At this stage in the preferred pronoun debate, it's de facto gaslighting, an act of abuse. Trans rights activists have gotten the whole business of pronouns ass over teakettle. They're trying to colonize your mind with perceived realities that you know aren't true. And you're helping them do it.