P.s. maybe indirect dialogues are introduced for co-op roleplaying with microphones?
I think as Baardvark correctly highlighted, the main reason is to help make it sensible for different races, origin stories, and tags without an exponential increase in work re-writing the same lines of dialogue. I think they want to put more effort into providing unique dialogue selections based upon character tags rather than re-coloring the same lines of dialogue to fit the different permutations possible. It would either require a ton of work to re-phrase the same dialogue lines to fit each personality, or you would need to write such colorless first person lines to suit everyone that it would be bland anyway. I think they have invested their resources in the right place, and like Baardvark, I've found the third person dialogue very effective. It reminds me of choose your own adventure books.
