It's not a "bother" thing. It's budget. Owlcat didn't have the budget for the production values you are clearly looking for.
For graphics and voice acting I fully agree, its just on a completely different scale. They could have, and should have, had portraits for everyone. Vastly cheaper and makes a huge difference in the enjoyment of a game. And its not like they were a brand new studio, it was their second Pathfinder game even, it's hardly an impossible ask.