You can't possibly be ignorant enough to believe size doesn't matter in the NFL... Those two are so far of outliers it's insane.
There is a massive reason why qbs from Ohio St, Bama, Georgia and other blue bloods don't work in the NFL. The windows are TINY. If you spent 3-4 years not having to make any tight throws... You'll struggle in the league.
The original post was meant to be read the a short, injured and blue blood QB (together) is a recipe for disaster
I understand what you're saying about size but I also believe there's inherent bias at work. Scouts and GMs and coaches grew up knowing that tall quarterbacks worked. So shorter players of equal caliber get ignored in high school. Then in college. When it comes to draft time, only the insanely great short QBs are even considered.
There is a sample bias about short QBs potentially at play.
In a similar way we can argue there's a small sample bias at work with blue bloods. There are what, maybe 10 blue blood schools? And 60 other P5 schools. So there's less to work with.
QBs that have recently come from blue blood schools:
Tua
Mac Jones
Trevor Lawrence
Burrow
Fields
Haskins
Herbert
There's probably a couple hits and couple misses and a couple averages guys there.
I agree with your point that an oft-injured QB will be hard pressed to succeed.