It doesn’t “have virus-killing properties.”
It kills bacteria.
You don’t die from the flu or COVID-1984 viruses, you die from the opportunistic bacterial pneumonia it creates the conditions for.
This guy may be an expert on Ivermectin, but he’s not an expert on viruses.
Ivermectin was shown to inhibit viral replication. Preventing COVID going into the pneumonia stage greatly increases the chances of surviving because as you point out pneumonia kills.
Which is one very valid reason to fight against being put on a ventilator or having a loved one put on one. Ventilator Associated Pneumonia is a real threat.