It's still true. Routing is a thing. The problem is that when Google decides to lock you out because you've been branded a heretic, it's not dropped packets. The system doesn't route around bans, only lost data.

The internet has never "routed around" censorship. Every site has always been able to refuse service to anyone they wanted. The reason they didn't in the past was because people would correctly interpret that as a red flag and everyone would leave. Now that they're too big to fail, people don't have that choice any more, so the sites are doing whatever the hell they want with no consequences.