Sure, if you ignore how much more impactful a quarterback is than a center in hockey. You’re talking about the general of the team that touches and commands the offense on 50% of the plays.
But if you want to run with that argument, sure let’s do it. Larkin is a problem in the sense that he is good but not good enough to pull a team out of the depths. If the goal is to make and win playoff games, being just “good” is not the same as “good enough”. If you aren’t “good enough” does that not make you part of the problem?
We can get philosophical on this as long as you’d like. At the end of the day, I’ve watched every single game the Lions have played in Stafford’s career and he’s cost them in plenty of big moments. Again, I’ll never say he was bad. He just wasn’t the fix for this team. He’s plenty good enough to be the fix for another team. The organization is still the biggest part of the problem.