It is - there are three groups of people that do this generally the completely self absorbed, people from places where it’s culturally acceptable, and people that like the feeling of empowerment that comes from inconveniencing others (the same people that will walk out into traffic with no light / crosswalk)
How is walking over a road without a light inconveniencing anyone? I’ll cross the road when it’s clear. I don’t blast music in public places though.