Even if you understand the downside of centralized systems (and most people really do not), you cannot individually do anything to stop them. So you use them out of convenience.
"Decentralized" people are out of touch only to the degree that they believe that they can change the world based on collective altruism. That is an uphill battle. They are not out of touch in realizing the dystopia that we are heading towards.
I imagine two possible scenarios for decentralized systems to take over:
a) Dystopia goes mainstream -- one scenario: "social credit scores" become common practice and people start to fear using the web to an extreme degree;
b) Someone comes up with a decentralized system that is able to do something, only possible with decentralization, that everyone really really wants.
I hope b) happens first.