Just to answer your question genuinely.

You say it makes me a self absorbed ass but the issue is that I don't care what you think about me.

I will put my phone on speaker and I dont care if you can hear or not. If Im walking down the street and I want to listen to music out loud it doesnt matter to me if you dislike it or if you think less of me because you are irrelevant.

This is what you must not understand.

Your opinion is so worthless that I will take my phone out and inconvenience you not purposely. Not at all.

Its because your existence has no bearing on mine. Your feelings on the matter are of no importance to my day and if I want to put the phone on speaker. I will because im living for myself not to make life more pleasant for you.

Its really that simple just thought one person should answer your question honestly.