Ah, stocking up on $2 tests would be awesome! That I would certainly endorse.
My reasoning on antigen false negatives is coming from a few lines of evidence. Perhaps I can share some later. But in short, 1) lots of studies have found much higher than average false negative rates, so results are high-variance/heterogeneous 2) my anecdotal counts of people around me concords with the above studies 3) my prior is fairly high on studies overestimating the efficacy of tests, based on BOTH lab conditions being extra controlled and on scientists being biased toward finding higher efficacy (and this affecting studies in a real way that is hard to control for). Thus my preferred resolution of the mystery between anecdotal efficacy and average study efficacy is that studies overestimate efficacy.
First, I think we are all still pretty far from living as normal. Many things in our past lives would have been more than 1k microcovids.
Second, even the most informal versions of test and trace (telling your friends if you develop any symptoms, so they can tell their friends) can significantly reduce transmission rate.
Third, all this is in the context of the holidays. Fourth, 30yos are not the only segment of society. Fifth, the health care system is not yet close to capacity in almost all places (if your local hospitals are overwhelmed, obviously do not act normally). Etc