Hmmm... How does an anti-biotic shot help fight a common cold or covid?

But this post is troubling in that I bad a friend who tested positive for covid with a home test kit and called his Aurora clinic (2 days into symptoms) . His doctor was on vacation and they advised him to go to an urgent care clinic. He asked if he could speak to a back-up doc as he had covid previously and had tested positive twice and it seemed illogical and unnecessarily risky )and inconvenient) to have him go to a clinic where he could spread it? Keep that in mind when setting an apt. two months out and they ask you if you've had, or exhibited symptoms of covid within the last 14 days.
He finally went online and got a prescription for Paxlovid w/in 45 minutes later...I've encouraged him to question Aurora and to see if that is their official policy. This is not a case where they do not prescribe Paxlovid and I am troubled since I use the same healthcare provider where in that or a similar circumstance a primary doc won't take a call even if on vacation, and use an urgent care as back-up (this was the week of Christmas). Has anyone else encountered this same thing? I mean this is a person who did due diligence and tested twice but also was familiar with smptoms, but also was considering others when questioning going into a clinic. Was the online doc/healthcare provider negligent? I don't think so...Has anyone else experienced this type resistance with their primary clinic/care provider?