Propaganda was just as bad before the internet existed except people had no idea it was propaganda because there wasn't an easily accessible open space that allowed them freedom of communication with alternative views and without censorship like the internet.

I trust no one to censor in a neutral way. It's inherently impossible.

>dark psychological strategy that hijacks our brains reward system.

This is fixed by personal responsibility and properly teaching children how to handle the information. It's really not that different than any other addictive tendency. The fix isn't just banning it.