Thank you for helping in all these emergency rooms, and I’m sorry that some people are downplaying the virus’s effects on mortality in the USA in 2020.
People floating potential alternate explanations is not a downplaying COVID. It's trying to better understand the issue through open-minded inquiry, and giving people like the OP an opportunity to help inform people by sharing their reasoning and personal experience.
Equating the consideration of different theories with the rejection of one particular theory will discourage the kind of free discourse that makes society more informed.
Equating the consideration of different theories with the rejection of one particular theory will discourage the kind of free discourse that makes society more informed.