There's too many white dudes in lead roles in games, and I don't really care how well written they are because the problem isn't bad characters so much as it is one specific demographic being over-represented to the exclusion of so many others. That's why the whole, 'what about Arthur?' argument doesn't really work for me--Arthur may be a well-written character, but he's still another white dude in a sea of white dudes. Like, look:
Gender Breakdown of Games Featured at E3 2018
24% of games shown at E3 last year had set male protagonists; only 8% had set female protagonists. I don't have a similar breakdown by race, but I really wouldn't be surprised if the disparity were even worse.
Also, on a purely self-interested level, I much prefer playing women to men, so the glut of dude-focused games is a bummer for me just 'cause it makes it difficult to work up an interest in a lot of stuff that I'd otherwise maybe be excited by.