Hard disagree. Front end development was an order of magnitude easier better faster before FB pushed React into the dev mindspace.
Believe it or not, gmail was a much faster cleaner better interface before they switched to Angular, and FB worked much better and was way less buggy and slow before they switched to React. The reason the mega-caps pushed their use was to offload processing power to the client, which saves them server costs. Front end JS frameworks don't solve a problem almost every other company has, hence why they had to be pushed by FB/Google, and didn't grow organically from the open source community.
I think bringing the functional programming approach and princinpled state management to frontend was just something that the time was ripe for.
(Also React was much different back then, before hooks, etc).