@morello Why can challenging smite allow you to kill anyhing with an invulnerability or death immune

true damage is not meant to allow you to kill tryndamere during his ult or kill someone with a GA or a Zilean ult or aatrox passive on them without setting off the effect of their instant respawn. Challenging smite however, allows you to kill anyone you want at any time, regardless of invulnerability or death immunity. is this a bug or an intentional balance choice? if it is intentional, what was the reasoning behind it. was the viability of any of the champions or items in question taken into consideration when challenging smite was being developed?