Why don't we want to talk about grammar?
English speakers are notorious for not having a very strong understanding of English grammar. Many of us who are of teaching age were educated at a time when ideas about language development did not include, and often explicitly excluded, focus on form. Not knowing the syntax and structures of your own language makes it harder to learn other languages in many ways; contrastive awareness only works if you can compare a form in a new language to the same or similar in your own
