What this piece should be titled is "We don't have any evidence yet of multiple strains."
This would be akin to one person making the claim: "Unicorns are not only real, but are causing a global pandemic" and then someone writing an article titled "Unicorns aren't real, STFU". The second title doesn't have the burden of proof and we wouldn't be having this conversation if these were the titles of the respective articles.
Why is the unicorns title an accurate analogy? Because the science doesn't expect there to be multiple strains in the same way the science doesn't expect unicorns to exist. I'm using the same vernacular here that we use in science. I didn't say "unicorns don't exist" but "we don't expect unicorns to exist". This is how we say things.
It's speaking different languages that have a high overlap, but key words may have completely different meanings.
And, when you're talking to a regular person, being able to speak English will help you convey your point.
> Well we're chimps that can barely communicate with one another even when we speak the same language.
Doesn't matter, the author still made an unsubstantiated claim, and hence is unscientific. He should change the title.