Walkthroughs.....walkthroughs are not cheating. Consider the following. Someone got a game, but can't be bothered (lack of time, lack of interest, any one reason) to play it the "legit" way, which in modern gaming means following the predetermined path by following the long cutscenes' clues and, optionally, find a myriad of bullshit tokens.
I won't hold it against him for wanting to skip the cutscenes and do whateverthe hell (s)he likes. Especially when it's for overcoming a puzzle. Even WITH a walkthrough he still needs to have the skill to overcome the challenges the game lays out for him, although in modern gaming that amouns to mostly next to no challenge but puzzles.
With a cheat, one doesn't even NEED to have skill, so in my mind it's an entirely different thing.