By your logic, any laws that restricts or controls the supply, sale, or advertisement of any kind of material or content to children is against freedom of speech.
Just because it is bad for you doesn't mean it should be illegal, adults should be able to do what they please even if it hurts them.
So this is a pretty practical solution to protect the kids without infringing on adults freedom per se, because even if some adults lose access, as I said, nothing of value is lost.
You think VIM is a niche? neovim + vim is used by over 38% of developers according StackExchange survey. That is more than 1 out of 3 developer, closer to 2 out of 5.
I am not sure what is going on with here recently, maybe I have overgrown the place, or maybe everyday a little by little this place is getting filled with people who shouldn't be talking about CS.