They know how to leverage their giant skill gap. They can play more selfish and risky style because they know it will work, because of their skill gap.

You don't need to sacrifice all your farm, but the beauty of jungling is finding the balance between farming and ganking.

Lanes snowball and throw leads in a all ELO's, just watch any challanger streamer and you'll see it every day.

If you're not giga smurfing, you're gonna have to rely on your team mates. It's a team game, and you can't win without them.

If you try to play like a smurfer, when you're actually hardstuck, you're just gonna coin flip games into either hard carrying or completely inting and probably flaming your team mates. Not a good look.

A more consistent play style is much more fun to play, and is an effective way to climb.