A rational, reasoning being will present new arguments and facts to the conversation to convince the other person,
I have heard enough live music to know what it sounds like. The DT770s have the same balance of frequencies as a live concert. Headphones with less bass, therefore, underrepresent it.
If I tell you "Dropping that rock on your foot will hurt.", are you going to respond with "That is just your opinion. Pain is subjective."? Of course not, facts are facts.