Proper ettiquette in jungle
Laners, if I decide to donate my buffs to you during mid game, that means you get that camp. That does not mean I'm willing to give you another camp right after I leashed you the buff. For example, if I give you Red buff, that does not mean I agree for you to take my Golems right after, especially when I'm doing them. I already gave up precious exp, don't be an asshole and put me more behind when you can go to your lane and farm minions. Just like how us junglers don't stay in lane after a gank more than necessary, don't take our camps more than necessary.
To answer why can't I just go to lane and farm instead of you, it's better for junglers to be off vision because that way they create map pressure. We are anywhere and everywhere. The minute the enemy see little ol me on one side of the map, that's screaming for the enemy to pressure the jungle objective on the other side because the person who's carrying smite will not be there to secure dragon/rift.