"""Open sourcing""" (this needs maximum scare quotes) games by AI-washing the decompilation is legally just about the same as cracking. You won't be able to deploy the result on a walled garden console and most likely not for for money anywhere, and FOSS people won't touch it with a ten-foot pole.
Illegality isn't going to stop anything. It's going to happen regardless.
Fixing this requires the end of free personal computing as we know it today. Every computer must become a walled garden. Everything the word "hacker" ever stood for must be destroyed.