Sorry but that's bullshit. Why? Because the examples React gives people to learn from are EXACTLY the type of utter garbage causing these types of issues.

Examples that SCREAM the people who created React aren't qualified to write a single blasted line of HTML/CSS much less the complexities of JavaScript.

JUST like HTML/CSS front-end frameworks and their promoting the worst of 1990's practices.

The lame duck "Don't blame the tool" copout being far past tired when people are trying to drive screws with the heel of a shoe. "Thinking in React" is an official demo on the official flipping website, and it is a poster child for those three "i" of web development. Garbage excuses about those diving into it not learning enough don't hold water when it's PAINFULLY apparent the people who CREATED it don't know enough about web development to be making a "framework" -- much less having the unmitigated GALL to try and tell others how to do so!