That's exactly the point; Nobody, including Ted, wanted a QB in the first round or anywhere near it. However, when you're at #21 (or near it) and one of the two guys projected to be the best player/top pick in the whole draft falls to you, it's 1. a fortunate circumstance and 2. an obvious decision to make.
True, none of the GMs picking earlier chose him - that's fortunate for us. It's also possible those other teams had more pressing needs and the Packers really didn't.
It's also possible that it really wasn't a very good decision to make, but Aaron Rodgers just turned out to be so damn good - better than anybody expected - that it became a super decision.
Anyway, my original point was, being a good GM is a lot more luck and circumstance than skill and wisdom.