[Kevin]

Other cultures really value their languages. In fact, in some places, for a foreigner to use improper grammar is looked down upon, for a native speaker, it's tantamount to blasphemy.

If someone has a poor command of grammar and/or poor diction, then a lot of doors will be closed to them.

Perhaps the problem is that the attitude in most classrooms when it comes to grammar is that we're going to teach you a bunch of rules, and if you don't learn them, you'll get a bad grade when the message needs to be that if you don't learn these rules, you [in internet parlance] will epic fail.