I respect your opinion but I think guys like Allen, mahomes , a Elway or Luck would be great anywhere....
A lot of Allen's learning curve was normal for any top QB for time and memorial.
The bills also didn't take any shortcuts in his development by going RPO or spread. Daboll taught Allen how to play QB the right way traditionally in the Earnhardt- Perkins offense ( the same offense Brady ran for 20 years) and it paid big dividends in parts of year two and obviously year 3.
His numbers would have been better if they just ran RPO but they did things the right way for his development
Allen in year two was actually much better than ppl realize considering the advanced offense he was learning.