I feel like I came at this from another direction. In my twenties I cut my foot pretty bad on a rusty screw so I went to the hospital and got stitches. The doctor didn’t prescribe me an antibiotic and I foolishly thought “oh they’re a doctor, I must not need one!” I of course got a pretty bad infection within a few days that required me to be on IV antibiotics for several days. I’m lucky I didn’t need any debridement or worse. I learned through that experience that nobody knows what the fuck is going on and you cannot count on “adults” because we generally know fuck-all.