The seasonal effects are trivially controlled for by comparing the growth rate of the variant to the growth rate of the wildtype at the same time. And that's ex

The seasonal effects are trivially controlled for by comparing the growth rate of the variant to the growth rate of the wildtype at the same time. And that's exactly how the original analysis was done, because the people doing it were not incompetent. For your seasonal effect explanation to make any sense, the effect would have to have only applied to Alpha but not to baseline Covid at the same time. And then it's not a seasonal effect, is it? It's an actual difference in the behavior of the two variants. The same goes for any other similar confounder that you try to manufacture.