Keith, the difference is that you played through the game before you cheated. Am I wrong?
By cheating before he even plays through the game once, he is robbing himself of the experience. Frantic enemy encounters, boss fights, etc: all of them lose all of their impact if you cheat through them the first time you come to them.
I honestly don't care if someone is bad enough at a game that they can only play on easy. Doesn't bother me at all. And if there is some special ending for beating it on hard only, by all means, AFTER you've played through on easy, cheat through hard if you want to see that ending. I don't care, you've gotten the experience at that point. Cheating through the first playthrough ruins that.
Especially Bioshock, where there's no penalty for dying. The game basically guarantees that ANYONE will eventually progress through the game, regardless of skill, on any difficulty. Sure, I died about 20 times against my first Big Daddy on hard. But each time I did damage to him first. I made progress. And I enjoyed the feeling of VICTORY after finally killing that ****ing Big Daddy after all those deaths. He will never enjoy that, because he's cheating through the game. And I feel sorry for him for it.