This seems to me yet another story of "We didn't knew X enough, so we switched to Y" or even worse, "we implemented our own". No framework solves the problems

This seems to me yet another story of "We didn't knew X enough, so we switched to Y" or even worse, "we implemented our own". No framework solves the problems of knowing your tools and learning every day, React is no different, not a red pill for every problem, you have to know it's quirks the same way just any other language/framework/tool you use.