The alternative is to take advantage of tools already out on the market developed privately to help people lock down and filter content from the internet. Content and privacy filters have been out forever...use those instead of the government heavy handedly imposing something.

My opinion (and strictly an opinion) is if diverse types of information are more readily available you can either lock down your child's access to that information OR you can prepare them for what they might encounter. Separately its also good to guide them on access and responsible use of the world's knowledge (good, bad, moral, immoral) which is literally at their fingertips