That is painting with a very broad brush. For better or worse, federal government is huge. It is not exactly a monolith. It is made out of people and, not surprisingly, not all of them agree with one another.
Except when the CDC is saying something, it's on behalf of the federal govt. They're also limited in what they can or can not say because of how they've classified weed.
So, if it's coming from an official US govt source and its about MJ, I'm going to be extremely skeptical of it. If they didn't want this reputation, they can actually go ahead and fix the criminalization now, but they're not. So...they deserve that reputation