They're not easier to target when your game is very unoptimised. Apparently even the PC version is very unoptimised and that you might be able to get better performance out of it by modding it.

It's not that it's entirely "unoptimized," it's that it's targeting high-end GPUs first and low-end setup a distant second. The game appears to make great use of advanced features and performs as expected on the highest settings with the latest cards by just turning down one or two problematic settings. The problem of course is that most of the players will not have that kind of setup and have been let down.

It could be unoptimized - other big PC games release at -O0 because their developers are afraid of bugs from compiler optimizations. There’s been mods in the past that just replace some of the code to fix this.

I've actually heard that it has CPU issues especially with AMD hardware.

I agree that high end gaming PCs can be a bad target to aim for because they’re unrepresentative of most rigs, the advantage that consoles have is consistency. No game developer should be surprised by their games performance on consoles at any point in the development lifecycle, since this is a known factor from day 1.