Why Luthen Rael's choices really matter

Even the most broken versions of ourselves have something to offer.

I appreciate how unafraid the show was in showing how being the "good guy" sucks a lot of the time. Luthen sacrificed his own soul and got his hands caked in blood specifically so others didn't have to

Luthen was a fascinating addition to star wars

I wonder where Luthens skillset comes from. A man of his talents, how did he end up in the army of a power whose cause he despises? I feel he must have been feeling very defeated and hopeless.