It's almost like wearing a dirty rag on your face until the waiter brings the breadsticks is not an ideal public health policy.
In this case, if GP were to use factual sentences, this might have been one way to phrase "the covid infection graph was flat in Denmark until government lifted the mask rules, then it dropped, and this shows that masks were harmful". The problem with such factual statements is that the error is plainly visible (the graph wasn't actually flat, the case count was dropping steeply). Phrasing using innuendo allows GP to hide the factual error. The intentionally imprecise language hides a lack of accuracy.