I haven't played all the Dark Souls games, but at least on DS1, the enemies are relatively few and far between, so "going ham" isn't really a thing. The difficulty of DS is in where the enemies are, move sets, etc, not in how many there are or the specific weapons they have. Putting on cheats on something like DS is like having a tool to cut through a puzzle and get to the end w/o interacting with the puzzle in any meaningful sense.

That's fine if that's what you're into, but I highly doubt you'll get as much enjoyment from it vs playing a game with a lot more interesting set pieces, like the ones I mentioned, or really anything with a sandboxy feel.

You do you, of course, I'm just pointing out that if you're looking for a casual slasher session or whatever, there are games designed for that, which would probably give you a lot more satisfaction.