Sorry used the wrong terminology. In any case a רוח מצויה is guaranteed to be מזיק. That is not the case here by any stretch of the imagination. Yes its dumb, irresponsible and wrong. Yes people infect other people, but could you imagine how many cases there would be if every single person with corona gave it to someone else?.
Your posts never cease to amaze me. רוח מצויה means common, not guaranteed. Somebody who lights a fire is responsible for damage cause when any common wind transfers the fire, לא עלה על דעת that it needs to be ‘guaranteed’. In fact the Mahrsha points out that if a fire travels by its own means without the assistance of an outside force like wind (perhaps also with a guaranteed wind), it’s אדם המזיק & one is chayav even without the גזירת הכתוב of אש.
So my point stands that an action that is likely to lead to harm (e.g. statically guaranteed) is in many ways treated the same halachically as absolute harm.
If every person with Corona would only infect one person, we would have far LESS cases. Unfortunately, most people with Corona infect a lot more than 1 person. The rate of transmission falls under 1 only when carriers are isolated and aren’t exposed to people who aren’t immune yet.