I think some people are just poor time managers. I ALWAYS read about premed and medical students saying they gave up friendships, stopped doing everything they loved, etc.
Of all the premed and medical students I personally know (including myself) and consider friends, I can't think of a single one who has given up friendships they didnt want to due to their education and never has time for hobbies. I have been busting my tail for the last two years preparing for med school, and even during my MCAT studying and while I was applying and working full-time I still managed to spend time with my fiance, play pool, basketball, video game, etc. with friends (many of whom are in the same boat as me), work out....I just don't get it. The first and second year medical students I know say the same thing, they still have time to enjoy life.