That's just another way of saying "my opinion is acceptable, and theirs isn't". The thing is, everybody draws that line in a different place. And it's just too easy to cast everything you don't like as "medical harm". It wasn't just people playing doctor who got censored for instance, it was also people just stating what decision they were making for themselves, not advocating anything for anyone else. And on the flipside, it's pretty easy for assholes on the other side to claim that they're "protecting children from medical harm (transgender operations, etc) from the LGBT community.
The only way this works, is if we become more accepting of opinions we fundamentally truly disagree with. Anything short of that, and you're always going to run into people who draw the line in a way you find harmful.