Disagree. I don't expect embedded engineers or language designers to take a large technology detour just to write.
Cloning the jekyll example repo on github then writing some markdown is not a large technology detour. Although I personally prefer hugo on gitlab.
So those hypothetical embedded engineers and language designers should evaluate how many options? You just enumerated two. I doubt they're the only ones.
They're all pretty much the same. You could choose any one at all and be much better off than using medium. It's easy to switch afterward anyway.
That's like saying you can't take a doctors advice seriously unless you are in the room at the doctor office.
Elitism at its best.
I mean how dare someone focus on writing and not on maintaining.