"Then you see no use or purpose in ever learning a foreign language. If you don't recognize the grammatical constructions of your native tongue, your understanding/use/acquisition skills in foreign tongues will be extremely limited. Also, understanding grammatical constructions is an obligatory rung on the ladder to being an astute communicator/creative writer."
This is a true thing.
Additionally, precision in grammar and care in syntax really help communications, especially if you are dealing with dinosaurs like myself who think good grammar is standard and therefore look at messages, essays, even forums, with an assumption that it is in play.
However, you didn't say you don't know good grammar, and you certainly are using it in your posts, so presumably the problem is merely with diagramming sentences and identifying their parts. That is somewhat tedious after you figure it out, but it's important, a basic skill that is never expressly used in the real world but which functions as a self-correcting background system that informs your speech and writing.
Do you know the significant difference in message between these two sentences?
"John's wife Mary died."
"John's wife, Mary, died."
Diagramming it will make the difference much clearer, if it isn't obvious to you.
Keep in mind I spent a great many years editing for a living, moving through prose like a weed whacker getting rid of incorrect grammar, misspellings and plain awkwardness. I may therefore set a higher value on this grammar thing simply because I've invested a lot of myself in it.
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