[a3n]

Counterpoint: I used to "and I stopped reading" when I ran into grammar issues. I gradually realized that it's worth the effort to focus on the underlying ideas and evaluate that, rather than someone's 2nd language ability. People are smart, even when they talk funny, y'all.

(The worth/validity of the underlying ideas is a separate matter.)

Counterpoint 2: Automated grammar corrections are risky unless you're a native speaker. Ironic.

[hinkley]

I think it’s helpful to recall that the language is called English, not American, and the people who are experts on it think we don’t talk good.

[zdragnar]

Most English speaking people everywhere speak with some variation on "formal" English. Even the received pronunciation in South england and london is relatively modern.

If anything, some American accents are closer to the English of the late 18th century than many British ones are, and the "official" received pronunciation is not without its fair share of critics.