I know it seems accuracy is the more important then arm strength.
But for me, in the NFL the window is so small (size and time before it closes) that I think arm strength to get the ball to the target ranks higher than the target itself.
I understand the argument that if you cant hit the side of a barn it doesnt matter how hard you throw it. But its not a situation where this extreme of a position realistically takes place.
Very, very weak armed QB's dont last in the league, even as a 3rd stringer. But, very inaccurate QB's do, or atleast inaccurate from a % stand point. Clearly if you can hit the side of a barn you arent in the league. Then you would be very, very, inaccurate.
So I just think ball speed (arm strength) is more valuable to an organization for timing of routes, etc than accuracy is.