Freaking YES. Movies need to spoon-feed a bit and so does TV, but you have a whole medium that lets people be as confused or not and that's a great thing. If a player doesn't care, there are options to not dive deep, if they do they will. My first playthrough I was confused what the genophage was. I heard bits and pieces but was genuinely confused. You know what I did? I walked over to my crew mate who mentioned it and asked him! Why is that so hard, the unknowns al_are_ the suspense! It's what keeps me playing.

Compare that to mass effect Andromeda where they introduce it by having two characters explain it at length in front of the player. This event that would be on par with WW2. So natural. "Hey friend, I was just thinking about WW2. You know, that war that involved the acid vs the allies fought between 1939 and 1945 in which we saw a fascist leader march across Europe?". Jesus hell have some respect for your players, stop fucking spoon feeding us.