The most common problem with this logic is this greatly overlooked bit.But the calculation suggests that it is possible. At least mathematics does not lie to us.
Theory says theory and reality are the same. Reality however typically disagrees.
I can't begin to recall how many ideas I have heard of now that due to some goons lack of being able to connect reality and its actions to scribblings and numbers on paper have turned out to be totally impossible because of that one little oversight of can what was imagined fit into the reality of the laws of nature that dictates our lives and the actions of every aspect of existence as we know it.