Here's a table from CDC of 'Comorbidities.'
Tabulated data on provisional COVID-19 deaths by age, sex, race and Hispanic origin, and comorbidities. Also includes an index of state-level and county-level mortality data available for download.
www.cdc.gov
See for example, "respiratory failure" and "respiratory arrest" and "cardiac arrest" and "cardiac failure." Those are not pre-existing conditions, but how COVID kills someone. If this is what you're citing, the only death certificates with nothing else listed on this table or an expanded table are incorrect, because "COVID" is not a cause of death, it's what COVID did to you that causes death. What COVID does is cause one or more organs to fail, and it's THAT which is deadly. Not "COVID." As we all know, 10s of millions got "COVID" and didn't die.
A big one on the list is pneumonia, which is generally a CONSEQUENCE of COVID (and influenza). You get sick with COVID then it's the pneumonia that you contract while sick that kills you, and then pneumonia damages your lungs, fill with fluid, they're unable to absorb oxygen, respiratory failure, and it's that which kills you, etc......
If you disagree, you can argue the point if you want, but I think you're misreading the data. And "nope" isn't a rebuttal.