You are vastly oversimplifying it and it's partially because you're in a 2-0 frenzy this week and need to calm down a bit. It's perfectly ok to have a measured discussion about football, eball, even with the Bills off to a hot start.
You're misunderstanding what FO does. They didn't simply say "he's inaccurate" and roll from there. They create (and constantly tweak, perhaps unlike PFF) predictive models based on historical performance. What they did was say, based on Josh Allen's college comparables, here is what our model predicts - and it wasn't an optimistic prediction. Predictive models aren't 100% accurate and, often, they need to be tweaked when an outlier like Josh comes along. I suspect, if Allen develops into a consistent high-performer, FO will acknowledge as much (as they started to this week) and take a hard look at how their model may have missed and what they can do to tweak it.
Not everything is black and white. Life is complex. There are a bunch of very vocal posters here who HATE nuance more than anything else and it's exhausting.