The CDC updated mask guidance was exactly the right move.

[Doc Sportello]

20. Other experts disagree

Such as former Baltimore Health Commissioner Leana Wen:
"being able to tell people you can get vaccinated, throw away the mask, is a powerful incentive for a lot of individuals. The problem, though, is that only works if it's coupled with some kind of proof of vaccination because if you only have the honor code, you've got some big potential problems here. People who don't want to get vaccinated could just stop wearing masks."

and

"I think what the CDC could have done was to lay out a road map and get us to this ultimate destination through smaller steps. There are actually two really key missing intermediate steps. One is to say fully vaccinated people can be around one another in formal settings. So that paves the way for employers to say, hey, if you're vaccinated, you can come back into the office, be in this conference room together. We can take off our masks, no distancing. It paves the way for restaurants, theaters to say if there's proof of vaccination, we can be here at full capacity. And then the CDC could say once we achieve a societal level of vaccination, whatever that may be, 60%, 70%, then we can remove indoor masking mandates and social distancing. That would have been something for people to look forward to. That would have added an incentive. It also would have been less abrupt because this was so sudden that businesses, local health officials are really reeling because what the CDC essentially did yesterday was to eliminate masking and social distancing for everyone and to make it optional."

https://www.npr.org/2021/05/14/996760419/how-do-we-know-whether-people-without-masks-indoors-are-vaccinated