I understand the thought behind not caring about the SEC tournament and not wanting the team to get worn out before the tournament that matters most. But the data doesn't really back the argument that you want to lose early.
I looked at the last 10 years of NCAA tournaments. 33 of the 40 teams came from P6 conferences, so those are the ones I focused on (i.e I don't really care that Gonzaga won the WCC or that Loyola Chicago won the Missouri Valley). So, of those 33 teams, only 5 lost prior to the semifinals, and nearly 60% of the teams played in the conference championship game.
Now, I do agree that the SEC Tournament has little impact on your seeding. Specific to conferences whose championship games are on Selection Sunday, I don't think the committee even watches those games. There is too much for them to do to alter any seeding based on those games.