The biggest changes to the Internet over the last few years are usually in the political spaces. There are a few other things but mostly its political. Those other things always existed but now they are online. But this isn't the fault of the communications medium, its the ills of society leaking into online spaces. If we banned those things online, you still as a parent have to worry about them happening IRL. Its better to talk to your kids about these dangers honestly and it always has been. Its always been easier to just prevent your children from being exposed to those dangers but that usually backfires later on. Banning unpopular political discourse to do that has never been the answer to these issues. But in this case, banning discourse is the goal and children are just the excuse. As proof of this, the same government pushing this only instituted a real drinking age in the last 10 years, in a country known for making liquor.

I understand where you are coming from but age gating is not the answer for a communication medium.