To the OP-
Your inquiry is very reasonable. I think the reason you got "why medicine sucks" responses is that it's very hard for those of us already well along into the path of training to come up with the relatively few "why I love medicine" items without sorting through a plethora of "why medicine sucks" items. I wish things were different. At the end of the day whether you do medicine should depend on how much you value the aspects you like and how much you can stand the aspects you dislike. I would still go back and do medicine if I were to start over, but there are days that make it very tempting opt out. And, honestly a lot of the rest of your life will be on hold for at least some of your training. Don't give up your interests; I, like you, have many and I do them when I can as often as I can and sometimes that means less sleep, but I'm happier for it.
I love medicine for that same cheesy potential to help people in a very basic and meaningful way. Now, that doesn't necessarily happen every day, but when it does, the high is truly quite high. Sometimes you have to fight very hard (against insurance companies, adverse social situations, uncooperative ancillary staff) in order to achieve a good outcome, and there are days when you have to decide that you can't fight the good fight on every front. For me, I am beginning to slowly realize and accept that in order to keep medicine personally fulfilling, I may have to embrace a practice model that I used to turn my nose up at; I find that unsettling, but helping people means being able to spend time with your patients, and I don't see that improving in either our current system or a socialized one. Apart from the helping others aspect, I also love the complexity of the human body; there's enough there to keep my mind going, and going, and. . .