In fifteen years Linux went from a hobbyist project in 1991 to a major infrastructure project underpinning the Internet; Golang started in 2009 and now is ubiquitous in the tech world. Plenty of analogous technologies exist that were created and flourished in fifteen years, and they did so by providing meaningful value without requiring universal adoption to become effective.
In contrast the Bitcoin paper was released in 2008 and blockchain still hasn't found the killer app that people outside of the crypto ecosystem rely on in some serious capacity. Fifteen years in blockchain tech is still slow, risky, and painful to use; scams abound and there's a distinct lack of boring, practical use cases that make blockchains a safe technology to use as foundational infrastructure.
What manifests as people trying to stop blockchains is typically regulatory bodies trying to stop money laundering or the sale of unregistered investments. This isn't some shadowy cabal trying to crush Bitcoin but institutions watching Celsius Network and FTX detonate and trying to catch up to keep people from getting burned.
So yes, the blockchain cat is out of the bag, but nobody cares. We are squarely in "put up or shut up" territory because enough time has passed for the tech to develop; if blockchains never catch on then it's because the tech just wasn't that useful to begin with.