Lane carrying slightly easier than jungler carrying.
sometimes as a jungler you are faced with the impossible decision of ganking which ever lane sucks least. Top is like 0/5, mid lane is AFK, and bot lane is like 0/20. It makes being a jungler carry hard. But if you are a laner, and if you are winning your lane, you can keep pressure, you are atleast 1/3 lanes that is winning, and your jungler can sit back relax, and just keep farming. (not really 100% but its easier)