I actually made a similar point on Tumblr just yesterday...
“Words have context and meaning and humans are gifted with the wisdom to discern what that meaning really is. For that reason, people who think microaggressions are real are microaggressors themselves…because even though they don’t mean to do it, their stupidity offends human intelligence.”
I've said this a time or two myself. Correcting people who commit "microaggressions" is a microaggressive act in and of itself. Annoying as all-get-out, too.
I used to work with a hyper-liberal (no shaving, no bathing, said she was a gluten-free vegan but ate cookies and donuts when she thought no one was looking) "Womyn" who had the nasty habit of correcting people's speech...."That seems like an awfully aggressive thing to say, instead could we say......"
First time she did it, I let it go by. Second time, I called her out in front of the entire staff (80-100 people) ..."Miss X, I'm quite capable of choosing my own words. Did you have any other commentary that you'd like to make? I'll wait." .. and I held up the meeting for a good minute.
She didn't do it again, ever. Was one of those perfect moments that you hope for, but only happen in your own head. :-) I doubt that I made her Christmas non-denominational, seasonal celebration day list, though!