>>716075040It literally can't be debunked because Bioware said it. I agree they did a shit job at it and mostly made him his own character, which I honestly much prefer desu, but he was not written with that in mind.
I don't have a source but feel free to look it up. In the release materials, Bioware said he was an audience surrogate. "Proving this wrong" requires proving they never actually said that, not pointing to any character traits of Vega's. What Vega actually does in game doesn't prove or disprove this either way.
Saying otherwise is like saying Indoctrination Theory is correct. No, the game just didn't do a good job of conveying what was actually happening. It has fuck all to do with in universe shit, Bioware just fucked up or abandoned a half implemented idea and some remnants of it remain sprinkled in.