Well, they are both banned in, say, Iran or Saudi Arabia... but I see your side there, for example, if they were banned in France, that would have likely saved lives, but it would also have meant a long slide down the slippery slope. For my flat-earth example, it would require the backers of the discredited argument to be taking to the streets armed, which luckily they at least haven't shown much inclination to do (and presumably why no one has really called for them to removed from public platforms).