English is always changing, so today’s common corrections can easily become tomorrow’s accepted forms. It’s precisely how we’ve arrived at where we are now. But there’s a core to the purpose of any language, and that is that we all understand it so we can communicate. We accept variations from the mean, but stray too far and meaning can change. Some people say we don’t need apostrophes as the meaning is always obvious from the context. I’d say that’s true 99% of the time, but there are always borderline cases where it can cause confusion, so it’s better to have a rule and accept that it might sometimes be disobeyed (wilfully or erroneously) than to simply abandon the rule altogether.