If you want to be a bum you can also live in your parents basement.
If you hate the idea of being a physician so much that you would only work 2 days a week why go into it?
Being a physician is a great career, but do you not have another other goals or interests you'd like to seriously pursue? Anything you look at and wish you could do? You may not, but others do. The great thing about being a physician is that you can afford to work part-time and pursue these goals... this is something many cannot do because they literally cannot afford to do otherwise, or their employers would not allow part-time work
For example, look at Noah Kaufman. His instagram is @noahkaufmanmd . He is an EM physician who only works 6 days a month, but started one of the most competitive American ninja warrior teams in the US. He's well known and respected within the community and has competed in American Ninja Warrior like 7 times.
That's super cool in my opinion, and I think it'd be a shame if he didn't decide to do it. He can go back to working more once he's too old to compete. I plan on working 3 days per week eventually, and I will use my spare time with:
1. Brazilian Jiu Jitsu... I want to compete and a black belt one day
2. Rock climbing... I want to get good enough to climb El Cap one day
3. Film... I want to direct short films on a competitive level. I'm going to start locally and go bigger from there
I could not get to a serious competitive level on all of these if I was working a full-time schedule. I could maybe do one if I dropped the others. 2 of these are very physical, and require me to be somewhat young if I want to be competitive in them.
I still get my fix of helping people in 3 days that I would in 5.