I have read the articles, but have not found an explanation or specific examples. It's not as if Tor doesn't care about onion services; they just spent 4 years designing and implementing the v3 onion service protocol.
He doesn't need to provide specific examples or explanations, doing so just makes the issue worse. Often these issues involve specific people and specific intuitions that will be hard to interpret without lots of context. It will put the problem people on the defensive and likely cause some sort of outrage or personal attacks, or other unwanted drama.
Being polite yet firm on his own page is the best that can really be done in these situations. It allows the technical problem to be magnified while not focusing on drama.