Fair point. Re substrate and cloths, I quarantine substrate too. Cloths are easy for me, I wash them and shower after going to a pet shop or other high risk environment. .
More difficalt though in a shared housing environment with limited space.
Like I said though, ventilate to room, Spray close to the carpet to avoid air bourn partials. Its the aireasole partials that's the problem, (like covid) if you can reduce them its ok once it coats the floor/enclosure and you give time before introducing snakes to it.. I have no problems, but to be fair, I do not spray it in the same room as my animals. I spray then move the animals once the partials have settled and give it a day to be sure. I have never had a problem.
But that's anecdotal. Take Bogertophis view over mine. they are much more experienced.
It works for me in my environment where I can take precautions. Your environment is different.