A con is that it only takes one wrong punch or fall to kill you or someone else. It’s that easy. But I didn’t have much of a choice about fighting. I grew up in a violent place and was bullied constantly. As a result, I’ve been in 200+ fights serious enough where I was hurt or bleeding, or the other guy was. Of those I was an adult for maybe 10 of them. The rest happened in middle or high school.
The other con is that my nose is screwed up, I have scarring on the inside of my cheeks from getting hit so much, and all of it likely caused some cognitive damage too. A few other scars too but nothing major.
I suspect my infrequent migraines resulted from head hits, as they do not run in my family and I didn’t have them prior to getting struck in the head a lot, and hard.
So, yes, kids, avoid fights if you can. They result in nothing good, in the end. And if you can’t steer clear of them, get good at fighting. I was forced to the latter option by the bad luck of growing up in rural North Florida.