Anyone who is not in that position, is equivalent to nil-experienced.
I don't know where you got that from. I have talked to quite a number of schools and have never heard that. In fact, many european schools are particularly open to specialists with a number of years experience (lawyers, doctors, finance specialists etc) regardless of managerial experience.
Plus even if you do get admission to an MBA, you will find it extremely difficult to catch up with the course since they assume that you are familiar with the terms.
you are somehow saying that by managing another person, that you somehow become a completely different type of human, able to work on a different level? if you are particularly weak in finance then yes it could be difficult to catch up, but not if you lack line management skills. you just won't be judged the same by employers after the MBA.