That, sir, is demonstrably false. Fact: for the majority of two-division SEC history, the halves have been well balanced. Only in the past 7-8 years have things gotten out of kilter.
You might recognize this chart; it has been on these boards before, because this discussion is not a new one.
From 1992 when the SEC was split into divisions, to 2008, the two halves were well balanced. Some years the East won more, other years the West. Back and forth. That was 17 years of balance.
Only from 2009 to 2015, the last 7 years, have things gotten out of whack. Not coincidentally, that corresponds pretty closely with the Vols' Kiffin/Dooley Dark Ages and the Gators' Fall from Grace period under Muschamp...as well as Saban's tenure at Bama (there is no debating it, that guy is a difference-maker).
So, 24 years of East vs West, 17 balanced, 7 unbalanced.
Yes, Vandy sucks. But looking at the totality of those 24 years, Kentucky is more like Ole Miss and Miss State (or Ole Miss and Miss State are more like Kentucky) than a person would think, if they only knew about the last 3-4 years. And Mizzou, for all their weaknesses, has won as many division titles (SEC and B12) as A&M.
Now, I'm a huge fan of the idea of flipping Auburn for Mizzou to rebalance the divisions. It just makes geographic sense, and should've been done at the start. Plus it puts an old rival into our half of the conference where we get to play every year. My only counter would be, let's go to 9 conference games, so we and Auburn can both have Bama as permanent cross-division rivals. That way we don't lose the Third Saturday in October.
But even if we don't realign the conference, balance will return. Life goes in cycles, it ebbs and flows. Football is just a part of life.