[manicbovine]

White noise is a more effective sound barrier in small spaces like planes. This is why the captain's announcements must be broadcast in very high-pitched tones.

Perhaps someone's need for a phone call is more important than my desire for quiet. I don't know, it's completely irrelevant to me because I don't go around looking for things to get offended about.

As a sidenote, I could make your same basic argument about crying babies, and yet nobody would take me seriously if I proposed a ban on babies.