Lets get it this way... What is the point of rallies in modern Presidential elections...
Are there undecided voters going to Trump or Biden rallies?
What is the reason to have 5,000 people in a rally during a pandemic?
It was perfectly safe as President Trump dispensed with the shaking of greasy hands and kissing of ugly babies. Further, the President had the people sign an agreement that they wouldn't get sick from the rally.
That's how you win the undecided voters...