A MBA is very useful for people to understand business analytically. But if one is really serious about theories then you do economics and mathematics. Except serious prominent schools, a MBA is one of easiest cash cows for many. For business people who teach them, it is good opportunities to sell their company and possibly to recruit them.
In a professional program, as long as they are accepted, pay a ridiculous amount of tuition and study normally, they can graduate. Many people in a professional program encounter difficulties in the beginning but their difficulties are not insurmountable. Most of the people will achieve a happy Hollywood ending in the end. Or what is the failing rate in B-schools?
Getting a PhD is a totally different from getting such a professional degree. At least that is how many PhD’s see such a degree. Many people who failed a PhD program or failed to see any meaning of the program often switch to a MBA and they usually do well. Or I do not know any one who failed a MBA but did very well in a PhD in science or engineer.
Many MBA and other professional degree people tell their stories and experiences but these seem to be remotely related to those of PhD’s. The life of PhD’s often prematurely ends before graduation despite their efforts. For example, their PI get fired or die more often than people think. These are extreme cases, but doing frontier science research means that often a project ends with negative results.
I ended up with doing something different but I was to work my PhD on Mar’s project whose data obtained by a Japanese satellite. But the satellite actually failed so if I was doing that project I would have wasted 1-2 years of my time.