Ironman
Genius, Billionaire, Playboy, Philanthropist
Thanos making the conscious decision to say I will save this universe by killing half of it while explaining that he doesn't take joy in doing this makes him a complex character. His philosophy and choice to go through with it despite him admitting that it's fucked up but needs to be done is what made him a great character. You diminish that completely with this emergence shit.maybe in this universe, he doesn’t have “parents” or siblings in a biological sense. Maybe they were a family like how the eternals are a family and the relationship between Alars and both Thanos and Eros is like father to sons.
we already seen them take liberties to storylines and origins.
Maybe, like dude said above you, it re-contextualizes Thanos’s motivations/mission.