Football is literally one of the most complex sports that exists in the world, where every play has basically 8-10 highly specialized things by professional athletes happening at once, including one of the most difficult singular sports position of all time (quarterback). You can literally spend a half hour breaking down each piece of a single football play because there is so much going on on the field.
I am not a huge fan of football culture, as the tendency in the past was to oversimplify the sport, and there isn't really any excuse for how damaging it is to the players nor the pervasive ownership culture that exists within it, but football in theory is one of the coolest and most unique sports of all time, and I am absolutely looking forward to flag football in the Olympics.