Language prescriptivism is almost always a proxy for some kind of bigotry.
It's never about what the prescriptivists say it's about. "The language" will be fine.
Words are not in danger of losing all meaning if the prescriptivist doesn't get their own way.
Such people are always associating a particular use of language with people they don't like: women, younger people, people who aren't white, people who aren't native speakers (a problematic idea in itself but that's for another time!).