Just because masks are not 100% effective doesn’t mean they’re not effective at all. The Surgeon General also dismissed masks and is spreading misinformation.
The Surgeon General dismissed medical masks, which are useless against this virus, they were not talking about masks that are sealed to your face and actually filter germs. Your post itself is misinformation.
Learning how is as easy as watching a 5 minute YouTube video. I have read this argument in other places and it is never mentioned that, while laypeople may not know how to properly wear a mask right now, it is not hard at all for them to learn.