I'm with you OP - I don't correct people, but poor grammar is a reflection of your upbringing and education, and doesn't get you very far if you work in a professional setting.

I can happily ignore typos, as everyone makes them, but poor grammar is another matter. I believe it is not about being lazy, rather, it's a reflection of the inner self.

When people put up with sub-standard communication, then that flows in to putting up with sub-standard everything else - namely education system, government decrees, banking cartels and everything else where it is possible to be lorded over.

Take back ownership of your self and your destiny with good grammar, one comma, or period, at a time.