They give a shit. They are dumping a ton of resources into trying to fix this, unlike other games like Mass Effect Andromeda that just abandoned their games.
But they also bit off way more than they can chew. They clearly didn't start working on console until way too late, after they had already built the begins and assets in a way that wouldn't really work well on console. There's not an easy fix here they could do but don't want to. They're doing what they can, they just fucked up bad.
People think optimization is just about efficient code. It's also about how you build your assets, about how you design the engine. To really make this game work WELL on last gen you would have to totally remake it.