I think what the parent is saying is that the parent likes to play this imaginary story in his head, and in this story, Tom Dale actually thinks React is better

I think what the parent is saying is that the parent likes to play this imaginary story in his head, and in this story, Tom Dale actually thinks React is better but can't work on it because he is known as a core contributor to Ember. Parent is saying React is so clearly better that even Tom Dale knows it. (I'm merely translating ... not stating any opinion of my own here).