Bono: Punk rocker?

On CBS Sunday Morning today U2's Bono mentioned he wrote a song about his mother for their latest album and it's not very punk rock to write songs about your mother.

About as punk rock as this?

I've been a U2 fan for over thirty years. Saw them in concert for the  first time at the Minneapolis Auditorium on March 19, 1985. I was a month shy of my thirteenth birthday and my mom said I could go if I found an adult to take me. My Aunt Eeny rose to the challenge.

I remember exactly what I wore: dark indigo cropped jeans with deep pockets on the side legs, white v-neck tee-shirt, pink Bennetton lambswool cardigan, pink and white striped socks and black loafer-style flats.

Not very punk rock.