The day the US stops air travel, many (myself included) will understand the severity of a proposed pandemic.
Since domestic air travel continued unabated and without direct testing to board a flight, it’s not hard to see how many people got the idea that this pandemic wasn’t all that serious.
Dr Fauci never once suggested it - to the best of my knowledge.
It was public health orthodoxy that travel restrictions are some combination of ineffective and counter productive.
Which there are infection scenarios where that might be true. This obviously wasn't one of them.
A standard line is that we couldn't restrict travel in the US because we aren't an island. But we didn't do much of anything, our travel was much more extensive than necessary.