Yes, one must have a really good QB to have a chance. But I'm not so sure you have to draft one high as you say.
Of the 12 playoff teams in 2016, only 5 were drafted in the top 10.
Matt Ryan, Eli Manning, Matt Stafford, Ryan Tannehill, and Alex Smith.
Ben Rothlesberger, Aaron Rodgers, Tom Brady, Russell Wilson, Brian Hoyer, Dereck Carr, and Dak Prescott were not.
In the past 10 years, top 10 QB drafted from 2004-2013 were
Andrew Luck, Robert Griffin, Ryan Tannehill, Cam Newton, Jake Locker, Blaine Gabbert, Sam Bradford, Matt Stafford, Mark Sanchez, Matt Ryan, JaMarcus Russell, Vince Young, Matt Lienert, Alex Smith, Eli Manning, and Phillip Rivers.
So you're theory doesn't seem to pencil out. More QBs in playoffs NOT drafted in top 10 than were, and a 33% hit rate in the top 10.
Those numbers don't warrant wasting a season over IMHO.
The problem has not been where we're picking, but WHO we've been picking.