The following debunks the 6% nonsense pretty clearly.
https://respectfulinsolence.com/2020...isinformation/
"Comorbidity" does not mean "co-causal." It simply means another condition existed. For example, with 40% of Americans formally obese, one would not attribute "obesity" as a "cause of death," although obesity is one of the underlying conditions which gets filed as a "comorbidity."
To put things in perspective, what "Singer" conveniently failed to mention is that at least half of Americans have an "underlying condition" that would lead to a "comorbidity" label. For example, 40% of Americans are obese. Roughly 10%, I think, are diabetic. Throw in the number of Americans with any kind of heart disease. Add them all together, and you get about half of all Americans having, as "Singer" said, "serious underlying conditions."
So "Singer" failed to mention that half of all Americans are therefore at risk. Interesting detail to leave out, wouldn't you say?
Then add in the conditions that create covid risk but are not technically comorbidity-labeled, such as pregnancy. Pregnancy puts a person at risk.