If you want to know how COVID testers operate in hotels, this is what they do.
Full PPE at all times except when removed for a break. They work in pairs with one person designated as tester and one for preparing and recording. Everything touched is strictly one-way. They don’t hand stuff back and forth. At the end of each floor or anytime they may have been sneezed on or feel compromised (touched by guest etc) they change out all their PPE. They are never alone.
i don’t think the same protocols could be observed by aircrew. Different risk profile, different control measures, it is illogical to argue one way or the other by comparing completely different circumstances or occupations.
Currently, Australian based aircrew can return from overseas and jump straight on a domestic flight to their home base to then isolate. I find that disturbing. I also don’t like home isolation as a critical control method as it relies too much on an individual doing the right thing. If there are other strong control methods in place, then home isolation is fine.