Thing is that's why they're called top coins in the market is that they aren't shitcoins. The numbers in reputated market tells us the charts hiding the technical aspects behind those price we see. Nobody can stop the "proliferation of shitcoins" as you mentioned. Scams are natural part of cryptospace already. It's just those investors that feed these scammers that's why they keep coming back in the market and to this forum actually. They're everywhere.
At any space, there will be always that bs word even outside the cryptospace.

It's like saying how long til robbers, thieves, and pirates stop doing their thing even if there's an imposed law and authorities in charge of those.

Even if we got scam busters here in the forum, there are still pretty much scammers outside the forum.