From your link: "These incidents only result in damage to the vagina from the corrosive action of the chemical, since potassium permanganate was proven to be ineffective in producing abortions."
"Don't try to flush out your vagina with potassium permanganate" is...very specific education. And horrific folk remedies like this show up all the time where abortion isn't legalized - "educating" would be a game of whack-a-mole.
Desperate people are going to do desperate things, things that they know are bad or won't work. Especially if the only option that does work is taken away.