Originally Posted by
TheLoadbearer
The same reason someone would identify more with the Tushui more than the Huojin pandaren, and choose them for any other reason than to play their panda as Alliance.
Preferring morals over action, being unwilling to do what is necessary to accomplish one's goals. They'd rather sit and wait, so that when the actions of those who actually do something result in something unpleasant like the turtle experiencing some pain when they got the ship out of his side, they can be all high and mighty and feel like they're morally superior for not being involved in the thing that resulted in the negative experience of someone, all while benefitting from it, but refusing to acknowledge that it is a benefit, like the Tushui's leader being mad at her boyfriend for setting the turtle on the path to recovery, rather than leaving him to die slowly from infection by the Alliance airship in his side. Or the Silver Covenant HEs condemning the Blood Elves for doing what they thought necessary to keep their strength up so they could survive and save Quel'thalas from the Scourge, while the Silver Covenant didn't have even the smallest fraction of the difficulties the Blood Elves had, and didn't do anything to help.
That's what makes Altruis dumb, and it's laughable to think that Illidan lorewise would have picked a demon hunter (the player) as a very trusted lieutenant to lead the mission to Mardum if said demon hunter were so opposed to their master's methods that got results that they'd willingly choose Altruis over Kayn.
The Huojin, Blood Elves, and Illidari didn't have time to do things the "right way" as the Tushui, High Elves, and Altruis would define it.
And after what Altruis did, it's stupid for anyone to pick him as second-in-command for any reason other than preferring a Night Elf character, if they really like what makes a demon hunter a demon hunter: not letting morals get in the way of the greater good, and certainly not undermining your comrades by going off as a rogue agent messing everything up for them.
In a battleground, which team do you think is going to win?
1. The team that's very coordinated, has a clear goal in mind, knows their role, and follows instructions, regardless of their personal feelings
2. The team that's full of tons of people running around aimlessly with no idea what they're doing, not following the leader's instructions because they think that they know a better way
The answer is obvious.