Is it bad to let a newborn cry for 10-15 minutes?

I never let my son cry for extended periods. If he starts throwing a fit when I'm in the shower I get out and finish when he's calmed down and entertained. Maybe next time end the shower session early. But that's just how I choose to do things and I guess some don't mind letting their baby cry for 15 minutes. I do mind and I don't do it.