Lots of people carry it asymptomatically, which is how it spreads. Its not a moral failing on your end. If you were a carrier already, it may be a sign that your immune system had a downturn for a while. Or you may have contracted one from someone else which was slightly different and your immune system has to update it’s adaptive response to the new variant
It doesn’t seem like the author of the article did any basic statistics to prove this point? What is the R2 and P value of these scatter plots? Are these even linear relationships?