I am experiencing such banning of providers right now. It is a whack-a-mole, seems futile. Not to mention that most people use sketchy free noname VPNs that are just too numerous. Or apparently some people set up basic XRay/VLESS/whatever and sell it via a Telegram bot...
You can ban big hosting providers, but even here they're cautious with measures like that because it would break WAY too much. Not to mention that you could just use a lesser-known one, even if it doesn't operate in the country legally.
So by going harder on blocking content that China? Because that's what they do but most of the big providers get through after a day or two of downtime each time the government make a change to block them.