France has had about 324,000 cases in a country of 67 million.
US has had about 6,400,000 cases in a country of 328 million.
Standing near people on bicycles is not the same thing as linemen breathing in each others' faces for a couple hours, followed by sharing locker rooms, hotels, flights, etc. and then returning to a campus where the pandemic is spreading like a wildfire.
Comparing the Tour de France to college football in America makes no sense.
Whatever football winds up being played this year is doomed from the start. It is the worst team sport for this pandemic, and no one has done a damn thing to make it work like the NBA or NHL did. I'd wager college football is called off entirely in about a month, if not sooner.