Good music is whatever is based on your personal values and that shouldn't change based on the values of the creators or genre conventions.
Changing your standard in judging music based on the genre it is, is an ultimate betrayal of self identity. It's like asking someone to change their personality for the sake of accommodating another person.
I have always had respect for the likes of old George Starostin (judging everyone via the standards of The Beatles) and the likes of Pierro Scaruffi (judging The Beatles by the standards of avantgarde composers), Christgau (judging art rock by the standards of The Rolling Stones) who stubbornly filter music through their personal identity than people.
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Regarding Greenberg and his level of interest - From reading his post and brief interactions with him (email and zoom meetings) he seems to have considerable interest in Rock music considering that a) he used to be in a rock band, b) he wrote post on Beatles, Stones, Dylan, Zappa, Presley, Queen (describe Bohemian Rhapsody as the most overrated rock song of all time), Aretha Franklin, Led Zeppelin etc c) Actively states that rock and roll is an influence in his own personal composition.
He is reasonably knowledgeable about rock music and he has actively made bold statement such as the music of The Beatles would last while The Rolling Stones (despite liking the latter) will not, which is rather controversial.
Although he would definitely agree with you regarding judging music within their own genre conventions though. I have to respectively disagree with him on that topic :)
