No what I was saying was if you are going to use a first round pick on a QB, it really should be a top 2 QB in the draft(generally a top 10 selection). Sure there are busts there as well but probably half the starting QBs came from this group, whereas the lower half of the 1st round seems to see few succeed. 

A first rounder has to be an starter in either year one or two. If you take a QB after the first round, you can take more chances and possibly find a Prescott level guy without losing the value of 1st round selection. Never mentioned a 4th rounder is a wasted pick in fact, it's the opposite. Low risk and high reward.