@kaia because it's a Bethesda game, not a Obsidian game, and after shitshow that Skyrim, Fallout 3, Fallout 4 stories and characters are nobody cares about story in bethesda games, so people play for immersion, pretty picture and exploration.

Skyrim story: you're finally awake, time to either join the gestapo or the nazis, no other choices and oh i guess you can do the dragonborn stuff

Fallout 3 story: Hello, son. Do something normal and good or do something maliciously evil for no reason.

Fallout 4 story: Where son. Yes/No/Sarcastic.