You don't think thats an accurate statement?
nah. QB has probably the most reactionary responsibility, since the ball goes through him on ever play and is the biggest decision-maker on the field, but overall...football is too much of a team game for one position to be clear cut above all. theyre really trying to change it now making the league extremely pass-happy...but still.
unless a qb is elite or on other end of spectrum, garbage...he doesnt really affect the outcome of the game more. and if a qb is elite, I can name you a few positions a few elite players make as much impact. like, revis, jj watt/justin smith, AD, randy moss/to, ed reed/polamalu in their prime, and so on.
so since most qbs fall in between garbage and elite, for most part their impact on the game is greatly overstated.