Stop stressing. Take it easy. Relax
Did we hit a sore spot, did we? Anything worthwhile is hard work. Many people work fulltime and then study for the length of time this kid plays guitar for. For him to seriously have no down time, he would have to play guitar about 8 hours a day, which would give him RSI and blisters.
I'll say it again, 18 hours of work a week and a few hours a day of guitar gives you plenty of time to chill the fuck out, and sounds like my idea of a goodtime.
Once again, stop stressing. Take it easy. Relax.