No other vaccine is given entirely under the pretense that it will basically only be of benefit to other people.
COVID had a 0.1% IFR across the whole population.
If I am 18-30, why would I take a novel vaccine when it doesn't even prevent the illness or make me meaningfully more likely to survive? "To protect grandma, of course!" isn't why we agree to use TDAP vaccinations or formerly administered Polio or Smallpox vaccines.
The US population is around 340 million people, no matter how "low" a rate appears (besides your number being wrong, it's 1% [1] and the number of reported infections is likely to be way lower than the actual amount), the sheer size of the country will be problematic. At the very least 1.2 million Americans died of Covid over the four years of the pandemic. That is the equivalent of one average size city getting wiped out by a nuclear blast - if this amount of death were caused by an external force, the US would utterly annihilate that external force. Hell they flattened Afghanistan for a few thousand people who died in 9/11.
And additionally, deaths aren't the only metric. I caught it two times, I was out sick for three weeks with more weeks of lower productivity following because that shit fried my brain. Others had it worse, a friend of mine was out for half a year. That is an effect worthy enough of a mask and vaccine mandate.