Yeah, I think it's sort of a twofold problem.
The first is that a significant portion of our population does better getting information in small, black and white pieces without nuance. It's why stupid people get sucked into clickbait tweets and it's why Trump resonated with them. They are better at handling their leaders telling them to drink bleach and sticking with it than they are with the message changing as new information comes out. How stupid do you have to be to think that "we don't know yet" is in conflict with a more definitive statement a few weeks later?
But I do agree that Fauci is out his of element as a public figurehead and spokesperson. He's a scientist. He pontificates out loud instead of being consistent with a message. It can be confusing. He needs to learn when to stop talking, and he needs to learn that "we don't know yet, we're working on it" is an acceptable answer to most people. And the people to whom that's not an acceptable answer are irrelevant because no matter what he says, they will be angry partisan hacks. He is a TMI guy.
He is not a great "public persona at the front of an initiative". At all. They need to get him a spokesperson and have said person manage the message, and move him to more of a CTO role than CEO. He has gotten a lot of undue praise IMO. Great scientist I'm sure, not a great public figure.