I agree with a lot of what you said describing the SEC, but I have to respectfully disagree with part of your analysis. It's true that balanced, well coached, experienced, and talented teams can win in March. The experience Kentucky players have gotten the past two years in February is that they can manhandle and dominate weaker teams, and if they make a few mistakes here and there it doesn't hurt anything.
To me, there's a big difference between playing weaker teams where your star players can do whatever they want, and having those players challenged where they have to work harder to get open, work harder to make plays, work harder to rebound. A weak team isn't going to expose your weaknesses and give you something to work on.
When you play week after week and make sloppy mistakes, and it doesn't hurt you, teams develop bad habits and lose intensity. It's human nature.
Playing a tougher schedule, having your weaknesses exposed and getting punished for sloppy play and careless turnovers with losses toughens a team up for March Madness. Playing against the best of the best and still losing toughens a team up. You learn nothing about your team playing cream puffs, and since they can't exploit your weaknesses, it gives you nothing to work on to improve.
I just think that right now, once UK gets to the Tournament and faces real competition, they have a tough adjustment. They finally get their weaknesses exposed by a team that can exploit them, but there's no time to work on anything when you're playing for your life.
I'm not complaining, just pointing it out.