I think people often underestimate the potential educational value of senseless memes. For example, thanks to Spiders Georg, literally every teenager on Tumblr has a reasonable grasp of what a statistical outlier is and the sorts of problems that outliers can introduce into a native analysts. There are grown adults who don't get that - I deal with them on a daily basis.
"memes have educational value" actually statistical error. Average meme teaches 0 facts. Spider Georg is an outlier and should not be counted.
Memes teach culture if nothing else.
Internet culture. That's a fair bit different than what most people consider "culture."
The lines between the two will continue to blur.