OK, serious question for you, then.
Dr Fauci (and everybody else) addressing CV have three basic options, right?
1) Tell the truth to the best of their ability
2) Say nothing of meaning / dodge questions
3) Tell some kind of lie
There are obviously some steps in between these (only like about some things, etc), but if you think it's wrong of him to give his best estimate on the expected # of fatalities, what are his other options?
IMO if he refuses to give out any numbers (#2), that's not a great option. It opens up room for a lot of speculation about him (does he not know? does he know, and it's so bad he doesn't want to say?), which isn't good, and it also leaves room for every Tom, Dick, and Harry to throw their speculations out there without any "official" response/baseline - which isn't great either.
And if he lies, that's horrible for any number of reasons.
I'm assuming you'd rather he say nothing at all -- but IMO I'd disagree with that. I think leaders, especially in times of fear, need to be as open with the public as possible, to let us know what to expect so we can prepare for it and we have as much information at our disposal as possible.