This is not a true statement, in general. Some doctors might do. Not all.
The medical profession is only meant for those individuals who can cope up with the extremes. This profession should not be taken as a family business/tradition - my grandfather is a doctor, my father is a doctor, hence I need to be a doctor too.
The medical profession is meant for people who appreciate the worth of waiting. Nothing is going to happen in a day. Or in a month. Or even in a year. It takes years altogether to get established. That is where passion comes into play - if you're passionate about what your doing, the wait is just a matter of time!
The medical profession is meant for those who do not compare. My friend is working in US, I need to go too. Or, my aunt's daughter is getting married. I'm still in college. The moment one compares themselves to another person from a different course, it creates a hollowness which sucks in all kinds of depressive thoughts. I've been through this phase sometime back for a brief period, during final year, when someone very close to me explained that two years of hard work has landed me where I'm today, so I should focus on my work rather than thoughts because I have already experienced the fruits of patience and hard work once.
The medical profession is for those who are strong enough to fight depression. Jumping from the 10th floor is not the way to cope with depression. When I started my clinics in third semester, I felt humiliated every single day because I had no idea about the language. Majority of people in my college are from South, because there are very few all-India seats and even among those, the majority are from Kerala or Andhra. I could hardly talk to patients. It took a lot of patience, a lot of tears to cope up with that and today I can manage OPD alone. One needs to finish what one has started, no matter how difficult things get. This is a difficult profession and one needs to fight to be the best.
One needs to set clear boundaries for study time and fun time. For those who prefer fun time over study time, I believe engineering is a better option because I guess, in their course, one does not need to read everything from first to final year for the final degree examination, which means that in medical at any given point of time, one is expected to ideally know everything (which is almost an impossibility, but we're trained to do so!).
If a junior was to ask me if he/she should take up MBBS , I would reply - take up the medical course, if even in your dreams, you visualise yourself walking down the steps of a hospital with a stethoscope around your neck; if every thought of yours is focussed on being someone who can save lives; if you have the strength to work for years ; if you can deal with success and failure alike ; if being a doctor is the only thing you want and if you're willing to fight the world to be a great doctor one day !
This field is not for the impatient - the ones that wish to take a lift to success!