Being a skiller and not doing combat locks you out of too much content, including the best skilling areas and best tools for skilling at higher levels, so a main makes the game more enjoyable. You can't even teleport or high alch as a skiller since Magic gives combat levels.Hi.
I suppose someone could do only combat and no skilling, but then quests and some other activities would give skilling XP without trying to skill. There would be some quests you couldn't do without gaining skilling XP before or after doing them.
I saw a caveman only character on YouTube, and thought of doing the opposite, Surface Dweller only, no dungeons or underground, but there are very few monsters in general above ground, so it would be very restrictive in combat.Hi.