Covid19 isn't a respiratory virus. That’s what they thought early on because of the pneumonia but it’s a new virus and it took time for them to realize what's up and why respirators weren’t working as well as they should on COVID patients.
COVID-19 is an endothelial virus.

It affects blood cells and temporarily shuts down the bodies ability to remove over-oxygenated particles from the blood. We need oxygen to live, but it is also an incredibly volatile element. As the body stops removing over-oxygenatee particles, the blood begins to "curdle."

Then we get hundreds of blood clots. Often times, these blood clots fill the lungs, causing pneumonia. Even after it seems someone has recovered from COVID, the body is still filled with all these clots. This is why we’re seeing deaths from strokes and such among recovered folk.

This is not a virus to fuck around with. Natural herd immunity will be too costly, if it’s even possible. It’s a simple RNA strand prone to mutation, this may be like the flu where even a vaccination is only effective for like a year. Doctors are still learning about it.

Let's not be stupid.