Because meleers usually hybrid too and bring range armor. Very simple. Oh. I didn't know that, I don't pvp much, and when I do, I'm just messing around 1-iteming in Falador. But still, you could fix that easily, by giving range armor some negative range bonus. Maybe it would only take effect in pvp, because many monsters are nearly impossible to kill effectively with melee without range armor. How so? You could just flip on mage prayer, or teleport, and if your seriously pvping, I'm guessing you'll be prepared for any type of situation.