The problem is that people frequently use this type of argument when they are unable to spell or follow the basic rules of syntax and grammar instead of simply admitting they're wrong.
Language does change, over time and across many cultures. It doesn't mean that anything you write is automatically correct.
You'll never get anonymity in any sufficiently large platform. A few dozen people might see it on Lemmy. If their ideas are so big / important then they'll have to at least use a pseudonym.
I'm not surprised that you're confused