The point is that you do not actually want sales that do not compensate for the loss. Imagine the PS5 let you run arbitrary code on the GPU and also happened to be the best value for the money. It would end up in some compute farm, not living rooms, and Sony would pay for the privilege.

You misspelled appealing to game developers and publishers. Most companies will not invest on a platform that makes it too easy to rip them off.

You mean like gog?

gog is a store, PC/Mac is the platform.

Exactly. Meaning opening system doesn't reduce investments, they foster competition. In theory, people should not consider developing for pcs because they are really easy to rip off, and well, that is not what we see.

Gog was born as a bargain-bin store for products that required zero investment and were already widely pirated, it was only upsides as far as publishers were concerned. I know it's different now, but I doubt their no-drm policy is as iron-clad on new titles ar it was on old ones - it's probably left to publishers to do some traditional checks on their own, rather than using a platform sdk.