Why is business risky? Is it still risky if you go to top 10 B-school

Hey guys,

I always wondered when you compare medicine and business, medicine is fairly stable (always doctors needed, 150k+ job guaranteed, etc...), but what I am really curious is why business is considered a risky route. I mean I get it, networking + connections + prestige of B-school play an even more important factor. Assuming I had the choice to work at a mid-level PE firm (~10bills) next year as an analyst or go to medical school, from a financial and really mental viewpoint, wouldnt the PE analyst postiion be great? I am guessing getting a PE analyst position or say even an Ibanking analyst position at GS is like getting into a top 10 med school. I mean following a route of what many have followed, I would work 2-3 years as analyst, go to B-school for the MBA, and come out as an associate making 5-800K as an associate. I work as an associate for like 10 years and then eventually come out as as a VP of the same firm or another firm making over a mill. I'm sure the hours are pretty bad like 12-14 hrs daily but my main question is, are you relatively stable? That is, if you do everything right up until a point (PE analyst for 3-4 years, wharton MBA), are you in pretty good shape to seriously make solid $1 mill in your future job(s) If so, business in that sense seems pretty stable considering by spending only 4-5 years after ugrad (3 years analyst + 2 years MBA), you will have put yourself in a stable position for life to make serious $$$ as if you were a doctor who finished residency