I've heard a lot of people say that they don't care about high quality sound because they can't hear the difference anyway. I think they just aren't willing to try. But if they did - for more than just a minute-long demo - they'd start to understand why people choose to spend extra money on headphones or speakers.
I think it also helps if you listen to good music where higher sound quality can actually be discernible. Some people have a go to list of songs they listen to when testing new headphones. For me personally I test headphones with Bohemian Rhapsody.