I think there is certainly a massive amount of uneducated speculation going on in the crypto currency world, but saying things like "no one cares about decentralization" shows a foolish lack of knowledge about the whole space.
A lot of very smart people care passionately about decentralization and the technology is going to change a lot of things. It seems like from your post history you're going to have to be dragged kicking and screaming into the future.
I think there's certainly some interesting ideas happening, but the jury is still very much out on whether cryptocurrencies even have a future. It's been several years now and we have... what? Thousands of memes about never spending your currency because it's going to be worth x1,000,000 in the future?
Oh boy, you could say that about any tech that hasn't quite hit mainstream couldn't you? Including VR/AR and self driving cars, except these technologies have been around much, much longer (decades) and have yet to go fully mainstream.
Bitcoin itself is 9 years old. Ethereum is barely 3 years old. Meanwhile, people are building decentralized trading platforms, prediction markets, provably fair online casinos, an entirely new venture funding model has been created, crypto collateralized loans, virtual assets trading, IOT-based supply chain management, and so much more. You'd realize that if you looked past the memes, there's something there, it's still very early, but it's growing rapidly.
While there are a lot of people who care about technology it pales in comparison to those who just want a quick buck from a manic bubble, using the term "no one" is extreme but it's not completely unfitting.
Or some people like me believed in the technology and decided that an early fix was a good thing. Most people who were against the fix did not care much about ethereum, if they did they are on ethereum classic now.
The only thing most people want from cryptocurrencies is more USD than they put in.
Editted to better represent reality.