He could have, but he didn't. You're not his editor.
> But he's a senator.
He's also a physician. He might know something about infectious diseases that you don't.
> His statement was a dog whistle to his base.
Maybe it was. So what?
> They're not looking for an argument that people should be wearing N95s, they want to discredit all masking.
It's his prerogative to take whatever position he wants to take. He's a physician and an elected member of the United States Senate. I for one want to hear his expertise, even if it disagrees with the conclusions you've already made.