In my mind, that creates incentive. When you start the game, your older sister hates men, the wannabe thugs are feeling up your mother and they're eyeing up your younger sister like a delicious cut of lamb. You start the game on poor footing and have a reason to keep playing, in order to make a change.
We have our antagonists, they are trying to take advantage of your family, and you can either stop them or join them. If there wasn't some allusion to things going on, behind your back, you'd have no reason to stop them from happening. I like that, I feel motivated when I play this game. I'm not just collecting points, on my way to the next sex scene, I'm collecting relationship points to turn them away from NTR and either love or corruption points to decide which path I'm going down. I don't like NTR, but, for this game, I don't turn it off either.