Try to look at it from a different perspective:
Number of male LIs from DAO that couldn't be disgraced or killed for plot reasons: 0
Number of male LIs from DA2 that couldn't be disgraced or killed for plot reasons: 0
Let's not try to rain on other fans' parades for a change.
Don't get me wrong, I agree the OP is ridiculous, but I'm trying to see your point here.
DAO:
Alistair can get disgraced and or killed? (But why would you if you romanced him?)
Zevran can get killed (If you didn't romance him and/or didn't get his approval up)
Leliana can be killed regardless of romancing
Morrigan leaves regardless of romancing.
DA2:
Fenris can be killed if you didn't get approval high enough, and one other spoilery thing, but if romanced he already has approval up (or rivalry)
Anders can be killed for spoilery reasons regardless of romance
Isabela can be gone for spoilery reasons if not enough approval
Merril has plot armour regardless of romancing. I assume she can leave? EDIT Apparently Merril can be killed too. Thanks Zehealingman
It seems any ending where the LI leaves/dies/is disgraced is entirely the players fault/choice except Morrigan's.
Mass Effect, on the other hand, is a whole other matter.