Why do you think people usually gank bot lane for 3v2 when top or mid could be ganked for 2v1?
Its because marksmen are most cancerous, and as long as they remain most cancerous they will continue to be the predominant target of ganks.
Read my lips: Nobody wants to play against a champion who has a spammable, targeted, life draining, resourceless, armor penetrating, ranged nuked on a 0.4 second cooldown.
Nobody wants to play against it in dota. Nobody wants to play against it in heroes of the storm. Nobody wants to play against it in league. Your ass is a big fat target, regardless of the game, period.