Does anyone else consider selling luxuries to the AI and doing RAs with the AI as really cheats to the game, and not do them.
No, they are obviously not cheats. Cheats are mods or manipulations of the gaming system that give the player an advantage. Nor are they exploits because they are clearly an intended use of a game feature. If you choose to forego them then you are playing a challenge. The AI doesn't handle them very well, but it doesn't handle combat very well either. Do you think going to war is a cheat?
That's what I do.
Then you need to improve your vocabulary.