So here they are, literally stuck in a rut… and they can’t go anywhere if Dean just keeps on the way he’s going and Sam lets him do it. They only get to move forward after Dean becomes aware of the problem and actively takes a step to solve it. I think Sam not telling Dean he was infected was him actively avoiding jumping back into the “Take Care Of Sammy At All Costs” rut…
YEP.
It just might be symbolism.
On this show??????
PFFF. GETOUTTATOWN!