It's simple. When all 3 lanes need help, screw them all and solo carry.

The list goes on, but I think I made my point.
The only feeling we have is anger, anger directed at the foolish peasants who walk the rift whose land we own, that lane is my lane, i simply allow you fools to exist there, so when i take your farm 'tis not a tax, no, it is me claiming that which rightfully belongs to me that i allow your peasantry to collect upon when i am not there. We need not your sympathy, for the sympathy of fools is for fools and fools alone, we are above your foolish philosophies and pity, we are beings of pure salt, pure untainted salt, capable of great intellectual pursuits on this wondrous rift we call our own. For as the chessboard of the rift goes, we are the kings, the most important, you are all pawns in our little games working to achieve our goals, you are allowed to exist on the rift because we will it to be so, nothing else. So we will not accept your help, for your foolishness to put yourselves on our level is wrong, and we will not stand for it.
But they never think maybe the jungler needs help...
That's not true at all!
My teammates always think the Jungler needs mental help when they miss smite, don't gank, or afk farm!
/s
There's a point where my jungler gets invaded at level 2, when I'm still level 1 as the top laner, where I REALLY cant do much unless I want to throw my lane to hell and come back at level 2 (best case, we get a kill) or level 1 vs a level 3 opponent.