The Ravens won the championship in 2001 with a mediocre QB (They had arguably the greatest defense of all-time that year)
The Giants won two with Manning (Good not great), but again had one of the best front 7's in NFL history, and a helmet catch.
Point being, Wilson is good enough to win you a championship (he did) with decent players around him. You are not winning another one with the Blaine Gabbert's of the world. The odds are, playing the draft will lead to 9-10 of those for every good enough starter.