I've always found it odd how so many "Paragon" Shepards are unwilling to sacrifice themselves for the greater good so they instead opt to murder their allies so they can be reunited with their waifu or husbando.
Ah, the "Shrug And Just Go Home" philosophy.
In order for sacrifice to be worth it, the game must successfully convince you that it is necessary, appropriate to the story and circumstances, and will accomplish lasting good. If the game fails to do any of those things (which it did for many) then the player feels no motivation to kill themselves and resents that the only real reason to do so is to stop their robot buddies from dying.
If the storyline has just kind of committed suicide in front of your face and you're staring at a choicescape that looks unintelligible and meaningless, why not just pick the ending where you live since the only thing you really have left now is securing a good personal outcome for your character?
Shrug and just go home.
"Honey, I'm home. Weird day at work, the Reaper plot blew up. What's for dinner?"