The worst part of every game is the hour after it — unless a coach is staged on the exit route while forty thousand cars idle in the garage. That's the product.
Game-day groups charter for three reasons: the tailgate rides along (coolers, grills, cornhole boards in the bay instead of squeezed into trunks), everyone arrives and leaves together, and the driver stages the pickup so you're moving while the parking garages are still gridlocked. Add that nobody has to be the sober logistics coordinator, and the per-head math beats parking passes alone.