Meh. If you're going to rehash "its a waste of time" in buzzfeed style, go to buzzfeed.
None of your "reasons" are compelling except possibly #5; and for #5 there is a solution... present your teaching in an approachable way.
So, essentially, you gave up, and are making up excuses for why.
Thanks for the comment! Buzzfeed would hate me since I'm not an SJW. I haven't given up; I still post about theory and issues on my personal blog, which links to Facebook so my friends can decide whether they want to read it or not. Usually, these are longer posts with historical and philosophical context backing me up. Facebook is generally a terrible platform for this type of in-depth argument. It's generally cheerleading for your political team.