You are assuming a lot of things though. It's the middle of a successful season for him and he likely wants the Lions players and front office to not be thinking about him leaving.
He cannot say he is not interested in any other jobs and if he says, "I'll think about that after the season", like most coaches do, it will simply inspire sports writers and media commentators to publish a lot more stories as well as make sure he is included in every potential team's head coaching search, including during the current season.
I suspect that when the season is over and teams contact him, he will factor in a lot of things, not just "control", into his decision process. Those could be things like money per year, contract years, location/cost-of-living, draft picks available, existing star players, salary cap available, etc.
I never put any weight into what players, coaches, etc. who are under contract say about their next contract/signing while they are already under contract.
Nothing they say matters until they are available and in most cases, their public comments and tone will change considerably once that happens.