No friend.
The antigen test is great for infectiousness.
Yeah, the PCR is more accurate, but takes hours instead of minutes.
Ah, this may explain a lot...
https://www.mayoclinic.org/covid-antibody-tests/expert-answers/faq-20484429
FWIW, I think the prez deserves better than quicker and cheaper. If someone is getting near him, use the better test.