Qb in football is completely different than any other position in sports. Kane isn’t a qb. ROR isn’t a qb. It’s apples and oranges.
Now if these guys have major flaws then sure I’m hesitant to trade away all the draft capital as well. But if you are putting your career on the line believing a certain guy can be the guy then you go for it. Even if the bills are really good and deep, how far can AJ Mccarron get them?