Answer:
Listing some songs he enjoys at his leisure time or the genres of music he likes would have been a more concrete way to establish his authority as a person who does not hate music.
Step-by-step explanation:
In the second paragraph, while talking about the proliferation of people who over-indulged in the use of ear buds plugged to phones, the author mentioned in a hurried manner that he does not hate music. He did not go into details to demonstrate concretely to the reader that, on the contrary, he actually likes music.
Listing some favorite songs of his or informing his reader about the genre/s of music that he enjoys would have further convinced the reader that he had no bias against music or music-lovers.