Same reason he drafts anyone else in the 4th round. Maybe lightning strikes and he gets lucky even if odds aren't too good it will.
What does it matter what rd it's in? You have this unhealthy boner for Brady out of the 6th rd, but somehow the 3rd for Jimmy or the 4th for Stidham is not worthy?
Here's a fact:
The only QBs BB ever worked 1:1 with, DAILY, at whichever confirmed times this happened, was Brady, Cassel on the fly , JimmyG and POSSIBLY, as I have yet to see this cofirmed (atlhough it would make sense), and Stidham. Again, I have yet to see anyone worth trusting confirm BB did work 1:1 with Stidham last year...Just making that clear. I THINK he did.
This means all of the other QBs he picked, whether it be Davey, Kinsbury, Cassell, O'Connell, etc, were all intended developmental back ups, per Greg Bedard.
Fact.
So, regardless of where he picks the QB, what matters is the info about BB spending DAILY 1:1 time with the QB prospect, because that dictates his commitment and time.
So, right now, if BB had started working feverishly in early 2019 with Stidham, which is HIGHLY likely with Brady being a nozzle and skipping OTAs again, BB was readying him and he ascended VERY quickly to have a dynamite preseason showing and then looked fantastic last December with the 1s as baby Brady needed some rest.
None of this is made up. Brady skipped OTAs and Stidham did get reps last December and apparently our #1 D. It's not my fault you don't know these things.
So, this means you are mocking what could be BB's own choice, AFTER choosing Brady and JimmyG to develop and making Matt Cassell, a Pro Bowl level QB in 2008, as the future QB.
Your problem is you don't like facts and you have poor critical thinking skills, relying too much on the creepy anti-BB media.