@FairyGodfeather As far as I can tell, your argument boils down to: “there is one true way to enjoy this game as the author intended it, and I don’t trust myself enough not to take the easy way out and miss it. I expect many others will do the same. Therefore an easy difficulty level should not exist.”
While I can’t speak for you, I can speak for myself, and there I disagree. Feeling a little less frustration in a game isn’t going to lessen my enjoyment of it. If the game feels too easy when I play the easy level, then that’s all the more motivation to play the normal difficulty level instead. In fact I usually go straight for the nightmare level when there is one, and the hard level when there isn’t a nightmare level. I generally only play on easier levels in subsequent games when I’m trying to get every possible ending, and I no longer have the time or the motivation to start from the beginning countless times to experience every option/ending.
There’s another reason why I suppose I’ve suggested a character that is a bit more gifted, something a bit more fundamental, and it boils down to we players tending to prefer to play characters that we can identify with more strongly. Why is it so important that there be female characters as well as male characters? gay characters as well as straight characters? It’s all about improving the ability of the player to identify with the protagonist, making the game feel more inclusive. And quite frankly, I don’t identify with a weakness in any of the three attributes in this game. (Now an inability to sing a tune, that I could identify with…) Sure I could play a character with a weakness in one of these three areas for a single play-through just to see how it goes, but I don’t have it in me to play this game multiple times with the same weakness, and it would be the play-through without weaknesses that burned most vividly in my imagination because I’d identify most strongly with it. I’d thus much rather the weakness be an option to increase the difficulty level than a necessity.