The message(s) are the point. Misgendering people isn't nice, especially after someone has specifically laid out how they wish to be addressed. But yes, I will conceed I have been a little spammy and probably could have gone about it with less.
Hell, I have a trans friend where I still struggle with correct pronoun usage. I've known her for a long time, and it takes a lot of conscious effort to override the reflex sometimes. We try, we're not perfect, so stop browbeating us about it.