I can't.
There are accidents where even seconds matter and the effects of the jamming can mean the difference between life and death or even simply a shift in the a victim's odds. Or consider emergency services whose radios were affected: maybe paramedics were radioing in status updates to a hospital, or perhaps police officers were in the middle of receiving an Amber alert. Or, imagine that he's injured in an accident himself. He, and anyone else potentially injured in such an accident, are potentially at risk because people can't notify 911. If he's lucky, he's able to turn it off. If he's unlucky, and is incapacitated or otherwise unable to turn it off, well, that's quite the problem now, isn't it?
I hate dreaming up hypotheticals, but this story practically demands it. His actions were no less selfish than someone else's texting while driving.