You kind of bite your own point in the butt there at the end. Defensive backs aren't built to suffocate in coverage for ten seconds, it's impossible. Even NFL corners can't do it. Our blitz package that gets zero pressure absolutely kills our corners that are in phase for as long as they can be. Any receiver with a half knowledge of a route tree can eventually get open. It becomes back yard football and that's why Mahomes is so effective. NOW, we still have some bad, very bad habits as a defensive backfield and can definitely learn and grow, but give us a Harold Perkins or Smael Mondon, and I bet you $1,000 right now we don't see as many down field completions. Pressure is key!
(Georgia's secondary is not good, although Lassiter has stepped up, but their front seven get pressure and cause a lot of bad throws which help their d-backs. Check out Kentucky throwing the interception in the endzone last weekend)