MrBlackGeorge:
Your questions are getting at the main question of whether an MBA is worth the investment. Responding high-level to a few of them:
Q: Can you please explain me how will recent positive developments in ones career be good for admiting into MBA program?
A: It demonstrates early career success and talent. The schools want to see you are a high potential person who will also succeed after gradating from their MBA programs.
Q: For example, I get promotion and my decision is to leave my job for 2 years, to have no salary whatsoever, but to play school with students who are in school for sole reason of getting a job offer? Would those people at Yale think of me that I am insane?
A: People don't just look at the MBA as a costly recruiting experience. Many believe there is real value to the academic learnings, network, branding, etc. of an MBA program. How much you personally value those elements may differ from others.
Q: Leaving 250k job, to pay 120k for 2 years? So I gotta be promoted, then when I am succesful at my job, I gotta leave it and pepole at the university will think I am so reasonable person? Do explain.
A: See point above. If you are successful at your current job, don't have any interest in making a career switch, can go up the 'ladder' (without needing an MBA), then you should stay where you are. If you need a change and want to experience the MBA program for reasons listed above, you should consider getting the degree.
The MBA isn't for everyone. It sounds like you are one of those people. There's absolutely nothing wrong with it.
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Admissionado