Illaoi, Irellia, Wukong, Darius, Jarvan, Nasus and Garen do not commonly buy lifesteal. The stat is inefficient for them, and it's no better for them than Wota was for most mages. Gangplank barely has access to it either with the recent changes to his items. The only sustain they have access to in most games is the sustain from their kits, which is a perfectly acceptable place to have it, just like some mages and AP bruisers (Vlad, Morg, Swain, etc) get sustain on their kits.
The only champions you cited that this complaint is valid for are Graves and Jax and Aatrox. One lifesteal bruiser that sucks, one melee carry, and one bruiser-like ADC. Forgive me if two bruisers getting to violate the normal rule doesn't concern me much. It concerns me no more than Akali getting to still buy spellvamp does.