Are you suggesting that in games with "blank slate" characters it's impossible to create an intriguing narrative?
Not at all.
I'm saying if a Blank Slate character has no characterization and is not written into the story, then the narrative will suffer.
The companions in BG3 offer characters that are written into the story and provide necessary player involvement in the narrative (This is not due to their "Bioware-style" but simply due to their involvement with events that occur)
Pillars of Eternity games use blank slate protagonist, but the story revolves around them and their interaction. Same with Owlcat games, Kingmaker, Wrath of the Righteous, Rogue Trader. Your actual character is a blank slate. But is written to be integral to the narrative.
Even in Divinity. You're a blank slate character. But you're narratively important.
In BG3, besides being Tadpoled... Your personal characters have literally nothing to do with the world or narrative as a whole (Besides some random favouritism from The Emperor). They're just along for the ride.
