And the summer leagues I have seen are not fewer. There is one baseball field area I drive by frequently that has probably 15 or 20 fields. That's several hundred people hanging around that area any given Friday, Saturday, or Sunday. Yes, it's outside but so are football practices and games.
When you really look at real stats college athletes are not nearly as likely to come in contact with vulnerable people. I would argue less likely even than your average middle school or high school kid because college professors easily stay more than 6 feet away and the coaches are young.
The kids in my neighborhood have been hanging out since March. They never stopped. School closed so they went to their friends houses instead. In my opinion the only increased risk at school is the "super spreader" event but since a lot of schools are running at 50% or less that super starts to be diminished too. Grocery stores have been packed since March.