No. People have said this about every web framework since PHP5 and its not true. Web development does tend to favor fast iteration which can lead to problems if the tech debt compounds but that doesn’t mean the people aren’t developers, at all.
So what you're saying is that React spawned an army of people who we can call developers, despite them not knowing how browsers and HTTP works, what algorithms are, how to approach developing your javascript app so it doesn't become spaghetti mess in 24 seconds and abusing terminology from systems programming just in order to make their field appear more serious than it is?
Now, what word could we use for people who are not.. well, "developers"? Programmers maybe?
This is just as asinine as saying "every Ruby on Rails site I've ever used is still buggy and slow as hell".
No, every terribly coded site youve used is slow as hell.