I largely agree, but not 100%.         Many of us do it because we love  to...even when it sometimes seems an unlovable     occupation.
But  the reality is we all have to make enough money to stay alive and afloat.     

Some do it just for the money.


But I really don't believe a significant number  do it from any altruistic, good-of-mankind reasons......   so yes... those memes tend to annoy me because, like so much  media content,  they are simply wrong, but nobody seems to care about that.   And they  often tend to cross the line of being offensive and patronising.

Perhaps I do it because I don't know any better?