Неужели так сложно было спустя столько лет выпустить для ПК версию RE1 director's cut такой, как она была на PS1?

If I understood correctly what you said, there is no Director's Cut PC version, that is why GOG released the vanilla version. I believe if there was a DC version for PC, GOG would have been released it instead, otherwise they would need to emulate which was not the ideia I think...