The whole point of corruption, is if you don't corrupt you're protagonist sufficiently, then eventually certain scenes should not be available. I think there was one scene that required over 100 points of Lust. Well I've got over 190, so you would have had to miss out an awful lot of potential scenes giving Lust, to have 100 or less. That's a choice that people decide to make, not once, but many many times. So it's more than just choosing to avoid the more extreme scenes in this game.
If Zorlun decided to allow everyone, to do whatever scene they wanted, regardless of how many points they'd collected. Then it would make that part of the game meaningless. Either Myriam is very corrupted and she can do some very freaky shit, and maybe ends up getting so addicted to it, that all the vanilla stuff dosen't do it for her anymore, or she's hardly corrupted at all, and the freaky shit is something she would never dream of doing. Or you deliberately choose a middle course, where she ultimately has a greater variety of choices.
Personally, I think Zorlun has been really generous with the cut-offs, where certain choices become unavailable. He has a lot of leeway to make it much tougher. But he's chosen a relatively modest path, which the vast majority of players would have no difficulty attaining. If you can't meet the criteria, then it's because you deliberately chose not to, by avoiding a lot of content. So I honestly don't understand your criticism above.