There's no right or wrong way to do it, and a defensive head coach can absolutely make strong hires on the offensive side and help a young QB reach his potential.
The fear is the lack of continuity when you have success without an offensive HC who you know is gonna be there with your QB for the long haul. Zimmer had to replace successful OCs every year or two after they got poached and suffered for it, Quinn had to replace Shanny after Ryans MVP year and never got it right again, Vrabel had to replace Arthur Smith this season and Tanne took a noticeable step back, etc - you avoid that issue when your HC is the offensive playcaller and in lockstep with your QB.
The fear is the lack of continuity when you have success without an offensive HC who you know is gonna be there with your QB for the long haul. Zimmer had to replace successful OCs every year or two after they got poached and suffered for it, Quinn had to replace Shanny after Ryans MVP year and never got it right again, Vrabel had to replace Arthur Smith this season and Tanne took a noticeable step back, etc - you avoid that issue when your HC is the offensive playcaller and in lockstep with your QB.
No they didn’t. McDermott took them to the playoffs for the first time in like 20 years in his first year. They drafted Allen the next year. Fans weren’t calling for dudes head like that until this past week.


