A QB is very important and there are a lot of teams this year that could use a QB to put them over the top (like Jacksonville) or could use one to help with the rebuild (like Cleveland). If you get a good QB you're usually pretty set for being a playoff contender and that allows you to fill in the holes to be a Champion. Regarding this class, you have a group of QBs who have been performing very well for multiple years all coming out. It's a pretty good class for QBs,
If you get a good defense you can win a superbowl.
If you get a good oline and a rb you can go 12-4.
A good QB does not mean everything. The sports media keep acting like a QB especially this crop of QB's will win you 10 superbowls. These cats might not even get 6 wins next season.
business reasons*