Why do we play like this in ranked?

I think fighting every fight in ranked is just silly. I think in general, people don't know how to actually gain points in ranked. Esp random teammates. I could see maybe like below plat or below diamond it could be okay to just fight all match. But people don't realize in the higher lobbies the more you fight esp with random teammates the more likely you are to lose the fight and--yes-- lose rp if you're not at least top 8 or 5 . Just so many of my teammates will chase fights all game and lose rp when we won 1 or 2 fights and we could have just chilled in zone...like is it that hard to fight only when you come across a team after winning the first fight? or how about if a fight takes too long you dip because there's gonna be a 3rd party? Any critical thinking here? I'm sorry if this does come off harsh but not everyone is aceu. Yes, in order to get better you gotta fight but what i'm saying is to fight but fight wisely. Please don't throw other peoples games because you want to fight when you have 5 kp but get negative rp because....yeah...you all died place above top 10.