But the Web already is decentralised.
I just launched a web server on my computer (python -m SimpleHTTPServer) which anyone in the world can connect to. If I wanted to I could build an unmoderated Twitter or Reddit and foster a community maybe one day being the biggest in the world.
And if my current government decided to regulate me then I could move to a country that didn't.
Web3 seems to be much more about decentralised payments. Which is not really a problem many people are demanding a highly complex solution for.