Lol. What myth? It's a pretty common knowledge that blockchain and bitcoin are different. It's only for those who haven't dealt with crypto or who doesn't understand it that much that thinks these two are the same. No myths to be busted as most people don't even consider this at all.
Quite familiar knowledge for whom? Maybe for you and me, and some other people who are still a minority who understand some of the basics. If an innocuous speech by the Chinese president on the subject of blockchain can provoke a general euphoria on markets, then it's quite clear how many people actually distinguish Bitcoin from the blockchain.
If you just look at how many people think positive (for BTC) when a country just mentions blockchain, we're still far from some global understanding of this technology.