Cheese Team Comps

This season we seem to be seeing more cheese and less synergy between teams, not in the LCS but in SoloQ, I have seen a rise in and on the same team which may prove to be very good at "blowing up" people in a 1v1 scenario however, when the other people on your team are and , you are mostely leaving them to die in a teamfight because you get blasted so low by and long range poke synergy, combined with a mid for that extra poke damage and CC.

So why do people pick "all in" champions against champs with such long range poke and CC. Because if the other team is any good, you are at half health before you even get in range to hit anything.

My question is, why do people insist on taking champs like and , even when their team has 0 synergy. Surely people know how team compositions work but it completely baffles me.