Would you have stumbled upon your idea if it weren't for the MBA?
I do also have to say, the resources that Chicago Booth provided for entrepreneurs were quite amazing, similar to what you would get through a high-quality startup accelerator. Their New Venture Challenge is also really great and gave us the initial boost we needed to get off the ground.
In my particular case, the company would not exist without me getting my MBA, but this is somewhat of a unique example.