Quite the opposite, if you read interviews Bono has given on the subject.
I can't recall if it was something I read on U2.com, or elsewhere, but it was inspired by Aung San Suu Kyi, an imprisoned human rights activist who basically left her job (as a university professor?) and ultimately her family to stand up for a cause that she believed in. Bono was intrigued by this particular pull from family (his fascination with the temptation by darker pursuits is well-represented in the U2 catalog).
Ultimately it is a call to stick it out, hang in there, whether it be to a cause, a faith, a family or relationship.
After all, it's Walk ON, not Walk OFF!
; )