Except that it's not. Read a medical journal or two and you'll see why.
Children are marvelous asymptomatic viral vectors. Lots of vulnerable grandparents and people on immunosuppressants out there with insufficient or waning immunity.
And actually I'm not worried myself. This pandemic will end when enough people either:
1) get vaccinated
2) get infected and
3) get infected and die.
Those are the only 3 possibilities. The entire US has had more than ample chance to get a free vaccine. So the unvaccinated population's fate will be determined by the last two choices.
I will say that the 2nd choice isn't super-preferable. Long COVID, which will by conservative estimates impact the health of 15,000,000 Americans, is going to have a devastating effect on American healthcare for years. (Medical Journal article linked).