There is no science here. Just wild claims.
The N95 specification is an engineering specification. it is not science.
Masks are completely ineffective against viruses. Not even a surgical mask (a biocide treated version of an N95 mask) is effective against a virus.
You can stack 20 of them on your face and it won't do a damn thing except cause hypoxia. A single mask already does cause mild hypoxia. Wearing them for a long time is not recommended. They are useful as dust masks, but one should take a break in fresh air from time to time without the mask on.
Surgical masks are useful in surgery because they can help prevent goo from splattering on the surgeons mouth and nose, and they are somewhat effective against bacteria for a couple of hours (then they are like any other N95 mask). Surgical masks do not prevent a patient from getting infected. Antibiotics do that and maintaining clean and sterile equipment do that.
Fauci is biased. He's hasn't practiced medicine in decades. He's a bureaucrat, subject to government agenda and his own self interests (he benefits from being in the spotlight as much as possible). He ignores the N95 specification, and has made stupid conflicting comments about masks over the past year, first denying (correctly) their effectiveness, then saying they should be required, then saying you should wear TWO of them (to which MSNBC then suggested THREE of them!). The guy is a loon.