I agree in a way, but the problem is the definitions that virologists use.
According to some virologists, covid 19 has been isolated.
According to other viorologists, covid 19 has not been isolated.
According to some virologists, no virus in the history of the world has ever been isolated because they don't believe viruses exist or cause disease.
While the dictionary definition of isolate is clear. The definitions within virology are not very clear at all. If you ask 10 virologists, you'd likely get 5 or 6 different answers. There is a famous clip of somebody being asked about isolates in a documentary a few years ago which highlights what I mean. Virology is a gatekept profession.
Watch from 4 minutes:
The Truth About Virus Isolation
https://viroliegy.com/2022/01/11/has-the-virus-been-isolated-no/
The field is full of nonsense.
The real question is - does Sars Cov 2 cause the disease COVID 19?
You don't need to isolate a virus to do genomic sequence btw for variants. You just a sample from a person who has developed the disease COVID 19, and compare it to previous genomic sequences. Like I say though, this it isn’t evidence for an infection or even that there is a virus.
we can’t predict functional change by just sequencing a viral
genome.