I much appreciate your thoughtful comment. It appears that, speaking about core of the issue, we are on the same page (at least, based on your second paragraph

I much appreciate your thoughtful comment. It appears that, speaking about core of the issue, we are on the same page (at least, based on your second paragraph above). Because, in my original comment, when mentioning "grammar", I was referring to formal grammar (i.e., rules), rather than other aspects of a language, including idiomatic expressions.