While I agree with this, I also find that the "but think of the children" ironic retort also usually ignores the very real problems that technology can cause children (and society at large). In this issue in particular, if banning social media for children makes it less likely for adults to use it, I see it as pretty much a win-win.

Would you also want the government to ban junk food and recreational drugs? What about unprotected premarital sex?

I'd much rather live in a society with personal freedoms than a "healthier" one with government mandates on personal behavior.