Probably depends on the person and the game. If they're enjoying the game as an interactive storytelling medium, playing through it on god-mode is probably not significantly worse than struggling to win; it's no worse than a movie.
And if you enjoy dicking around and abusing cheats that’s fine but it’s about on par with smothering fine dining with hot sauce. Or reading the summary of a novel rather than the book.
Unfortunately few games have good modding tools, but the few games that have you will notice players using mods to "cheat" away parts that they no longer enjoy , like skipping some terrible level in Dragon Age Origins on repeat play-troughs. Other time saving mods are things like increase inventory capacity (it is not immersive anyway you can put in your pockets 50 swords anyway so why not double it and save your precious little time and not travel to a merchant).
Wasn't there a game where you could turn over your inventory to your dog, who would run back to a merchant, sell it, and return with the proceeds?