I used to chalk this up to me not "getting it". Now I think it has more to do with the desire to incorporate newness into React apps. Stuff like ripping out routers to replace with another router but then the old router was rewritten so lets replace it with that one again. That kind of stuff happens, and even it is preferable to someone deciding to incorporate something like [shudder] styled-components half way through a project. This kind of stuff almost always incorporates new abstractions that will increase surface complexity. In the interest of avoiding a rant, I won't start with people monkeying with context or not understanding the effects of setState.

React should be judged by the quality of it's ecosystem and extant production code, and I would argue that if you survey these things often you will find plenty of unnecessary complexity.