I think it is more the case that are these "proven" protocols have generally worked for the most part to the point where tons of things are built on top. While many things as are being build in the Bitcoin ecosystem, the number pales in comparison to these other protocols. Also, because Bitcoin does have financial and economic components that directly relate to it, it is easier to pick on as being a "scam" since these other proven protocols work without finance / economics, then why is Bitcoin trying to go and change that.
It's backward thinking unless you understand Bitcoin.
Sadly most people like to show themselves as superior by downplaying or criticizing something like Bitcoin because it makes them appear to have engaged in rigorous thought experiments from every approach using there expert knowledge when in reality they jumped to a conclusion after forming an opinion based on a clickbait article headline.
