If websites are turned into web apps with more features, it's probably because it's bringing in money, in the form of users or consumers, don't you think? If consumers tended to like simple "interactive" websites like we used to have 10 years ago, companies would probably not bother building modern web apps. But that's not the case. Web apps, in general, do provide a way better experience than simple websites, and users do like them. There is no propaganda at work here, just simple market mechanisms.

If anyone is to blame for showing that a better user experience is possible, it's probably those who pushed for quality UI in native apps, that web apps are trying to match.