Yeah. Treatment options have definitely gotten better. IIRC, something like 80% of deaths can now be prevented thanks to a combination of Dexamethasone, Monoclonal Antibodies, and other such advancements. Monoclonal antibodies may have stopped working for Omicron, but the Pfizer pill looks like it still works.
A lot of it was probably timing, getting hit early before doctors really knew what the best treatment options were is the "lightning" event for sure.
The father was older, near 70 and with some pre-existing conditions. He was being careful about COVID19. But the chain was nurse -> 35-year-old -> pass to his father. Sometimes, even with all the precautions you take, its not really possible to avoid the disease.
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Nonetheless, my sister works in the emergency room as a doctor. She's had to declare plenty of 30-some year olds dead. I know for a fact that my story is far from unique, plenty of other young folk have died from this disease.
You can talk to anyone who works in the emergency room: there's plenty. Firefighters / First Response teams, nurses, and doctors. Hear the stories directly from them.