In my opinion, people are most interested not in decentralization, but in the convenience of using a particular software product. 

Most people are committed to the principle of hedonism (enjoyment).  At the same time, adherence to the principle of decentralization requires certain efforts from people, and in some cases, the rejection of the convenience and ease of use of software products. 

Centralized services are perceived by people as reliable services, although in fact they are not.  In my opinion, people have to suffer serious financial losses in order to realize the danger of centralized systems. 

At the same time, those in power have realized the potential power of Web 3.0.  They missed the spread of bitcoin and now they will not allow the free development of web 3.0.