I don't think that is fundamentally broken. React is just not the right technology for a single button, and it's not trying to be.

If you tried to use photolitography (the technology used to print the circuits in microprocessors) to do tattoos... well it could probably work, but it would be highly inefficient and expensive and bad.

React is for complex web applications, and it I don't think it's a very valid criticism to say that it is bad for a different use case. To some extent, the React community may have over-promoted React as the final web-dev framework, but that's also a mistake.

In any case, kudos on creating Nue, looks really cool, I'll keep an eye on it ;)