All the other, regular preventable things don’t grow exponentially and as rapid as COVID-19 does.
Herd immunity would still mean millions of dead people you'd have to step over.
The countries that thought they could go this route did a hard reverse once reality hit them.
This disease is now the #1 cause of death in America. Nothing like a trifling total; nothing like a drop; nothing like an ignorable fraction. Very, very significant.
Are you going to atoms in the universe next?
So following this logic lets shut down all hospitals and stop treating all illnesses?