I think we do have some public health strategies, but for every sensible suggestion like mask mandates in schools their are people willing to fight them all the way to the Supreme Court. What is Biden supposed to do when opposed by the Trumper death cult? Round them up and put them in concentration camps? Vaccination is by far the best public tool we have, and 1/3 of the country refuses to comply out of sheer oppositional disorder.

Aerosol transmission is indeed rare. So is fomite transmission. It would be pretty useless to spend a lot of money and time on those, when droplet transmission is overwhelmingly common, and can be cut significantly by people wearing masks and getting vaccinated. Classic public health contact tracing does not work well with this virus because most transmission takes place before the spreader has any symptoms (if they ever HAVE any symptoms). "Put on a mask when you feel sick." does not help much. By then they have already spread it to people, who have already started to spread it to even more people. And the spread is not at all uniform: Researchers have found that 80% of the spread is from 20% of those infected, so contact tracers will spend 4/5 of their time tracking people who are not producing infectious levels of virus. And miss the huge number of cases of asymptomatic spread.

Things like the tracer ap in the UK are nice, but most of those actually getting seriously ill don't have smart phones. I don't. Should we issue all of them smart phones? Should we issue all of them GPS location trackers for a government contact database? Good luck getting that through Congress and the Courts! But just look at how that has worked in the UK, and you will realize that it's just theater.

Educating anyone benefits everyone.