Claiming that "users don't care about abstract ideas like decentralization" is a little bit like claiming "users don't care about abstract ideas like property rights or the rule of law"

I work for Ethereum at the Ethereum Foundation.

Absolutely. While users may not articulate it explicitly, they certainly experience the benefits. Decentralization, like property rights and the rule of law, shapes a fair and transparent environment that ultimately affects their trust and freedom in significant ways.