Brings to mind Winston Churchill's quip about ending sentences with a preposition, "This is the type of arrant pedantry up with which I will not put."
![Laughing :laughing: :laughing:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
And Churchill wasn't any slouch when it came to the English language. He won a Nobel Prize in Literature, for chrissakes! How many accomplished that in the U.S. state in which you were "educated taught English"? I'd guess, not you.
Also reminds me of an experience W. Somerset Maugham had (also no slouch with words). He was staying at a hotel and had conversation with an English teacher. He offered to let her review something he was working on for comments and suggestions. He received it back with a slew of grammatical corrections. They were of no use to him. Maugham knew his grammar but was concerned in the flow of sentence and the rhythms of normal speech, not in punctilious punctuation or what Churchill referred to as "arrant pedantry".
Something else to consider: I try to choose my words carefully but often, later on, looking back, cringe over some solecism or misspelling of mine ("Damn spell check!").
I've also found that challenging someone's grammar or orthography is usually an admission of weak arguments.