If this theme was brought before I apologize, But I'm not going to browse 532 pages to search something.
I have a big problem with this game and is the Chosen ones. Look, I get the joke but it doesn't work in universe.
I've played 19 hours and in all that time nobody seems to find weird or ask why all the Chosen look and act the same. I can understand that all them sharing the same portrait is just artistic license, but the other problem is that nobody cuestion why Ivala is choosing useless assholes as her Chosen.
Is this going to be referenced in some way or it's just bad writing?
The origin of the Chosen is revealed later in the story.
Now as to "why" people don't question their quirky behavior...some people do? I'm fairly certain Carina has a line early in the game where she admits she struggles to understand why Ivala puts so much power in the hands of these assholes, but it is not her place to question Ivala's will. Also it is possible to sense that the Chosen do emanate holy energy of some sort, so their connection to Ivala can't really be disproven.
For the rest, the Ivalan nations were almost destroyed by the Incubus King in the previous war, people are desperately looking for any source of power that can protect them and the Chosen, despite being incompetent, are undoubtedly more powerful than your ordinary soldier. The church also probably tries to cover up the Chosen's shitty behavior for most of the population, not good for morale and piety when the direct manifestations of your goddess' power behave like a bunch of immature twats.
Down the line the church would have to either completely whitewash the Chosen or go through a theological nightmare to make sense out of them, but that's something you do
after you have dealt with unholy existential threat next to your kingdom's border. Killing before theology!