Exactly. This is actually one of the issues we had at my company when we started talking about bringing people back into the office prior to the covid vaccine being widely available. The concern was we could have employees test negative before coming back, but testing negative today doesn't mean you don't get exposed tomorrow. There's just no guarantee that if I test my stock monthly or whatever, that someone still won't get a sick snake. There's also those people who might have it in snakes they already own, and try to blame the breeder of a new snake they just got, when in reality it was already in their collection. Taking advantage of the lack of information.
Hopefully though as the hobby continues to gain popularity we'll learn more. Kinda like parvovirus in dogs, we identified that what in the 70s? Now we have decontamination methods and vaccines.