It is still in early access and optimising the game is their current goal according to the road map, though as the whole concept of the game is about simulating every NPC properly at all times it’s always going to be really heavy game to run.
And you are right about accessibility making resource hungry games more common - they allow indies to make projects and use concepts that would have been scrapped as technically non-viable by a publisher before. Shadows of Doubt started development back in 2015, which would have meant reducing the scope of the game until it ran on a PS4. Being indie, they could just do whatever instead, and now it’s going to be enough if they can make it run acceptably on a PS5.