Indeed, if you look at what he was saying at the end of February, there was no concern about the way the U.S. was handling the pandemic. Look at what he wrote on February 28th[1] - his recommendations for the current pandemic are for richer countries to assist poorer countries, and for a vaccine to be made.
If someone like Gates sounded the alarm on the poor way the U.S. was responding, it might have made a difference, but he did no such thing. Like most of the leadership in the U.S., he seemed to have a big blind spot with regards to how bad things could get in America. Some people were sounding the alarm early on (take a look at the last minute of this video[2] for an example), but were mostly ignored.
If someone like Gates sounded the alarm on the poor way the U.S. was responding, it might have made a difference, but he did no such thing. Like most of the leadership in the U.S., he seemed to have a big blind spot with regards to how bad things could get in America. Some people were sounding the alarm early on (take a look at the last minute of this video[2] for an example), but were mostly ignored.
[1] https://www.gatesnotes.com/Health/How-to-respond-to-COVID-19 [2] https://www.youtube.com/watch?v=E8VImMUvz-A