What you're missing is that language is often used differently in subculture groups and other niches. Language frequently changes meaning depending on context, and that's how it's supposed to work.
Language never has been and never will be static. Shared slang is a very important part of signaling that you are part of an "in group", and it will always change rapidly, compared to language in more common usage.
Related: trans-phobic signaling that "they/them" should be used exclusively singularly as a plural, despite its common use as a gender neutral pronoun for centuries.