Why are IIM A, B, and C valued over FMS, Delhi when the difference between the fees are so high?

People often pose the question that despite the high fees, why do some people still prefer IIMs over FMS? Well, I think I can answer it with confidence since my father is an alumnus of IIM Ahmedabad. He told me that he was able to transform into a new person all because of IIM Ahmedabad. He was able to achieve many impossible things just because he chose IIM Ahmedabad. I have mentioned a few points that will help you understand what I mean

• After completing his MBA from IIM Ahmedabad he was able to pursue a technical MS and Ph.D. in Computer Science from North America. 
• He is now well settled in the US. He thinks it would have been impossible to move out of India had he not chosen IIM Ahmedabad.
• IIM Ahmedabad gave him the mindset and skills of finding opportunities in life and businesses and making the most out of them.
• The case-based pedagogy helped him tackle all kinds of problems he encountered in his life, be it scientific, academic, or business.
• It gave him the confidence to start his own business. Although it did not go quite well he still was proud to have the guts to try it.
• He had the excellent opportunity to learn from the best peers who were handpicked from a group of 80,000 applicants.

So IIM Ahmedabad is still preferred over FMS. It has its own brand value which will continue to shine over the years.