Sure. That is articulable probable cause, namely that you displayed signs X, Y, and Z of alcohol intoxication while driving. That's more than "a cops thinks", but rather that a cop can articulate specific evidence to suggest it's the case.
You can observe and articulate specific evidence to suggest that an individual is infected with COVID-19, or that they were in a situation where exposure makes infection probable.
Great. So make the law that people who have had high probability exposure must self-quarantine and make it an arrestable offense to be both subject to and breaking of a mandatory self-quarantine. I don't mind that being an arrestable offense. I do mind "I don't like the how Spooky23 looks today and they were out in public in a high-risk area, so lock them up!" "I don't like Spooky23 so I'm going to force them to stay in their house or a place of their choosing" has less potential for abuse.
Are we reading the same bill? There does not seem to be a provision to require the government to first advise a suspected carrier to self-quarantine at a location of their choosing and only detain them if/after that requirement is violated.
If that provision exists, could you point it out to me, as I've obviously missed it?