A visual novel with choices is not a game. Most visual novels with choices are not "gameplay". Kinetic, non-kinetic, doesn't change them from being visual novels. The only real "gameplay" games are the ones that you have to complete tasks before you can move on. Those ones aren't made with Renpy. If you need the illusion of participation, you’re playing for the wrong reasons.
First of all, I totally agree that a good visual novel does not need any choice at all. But I really do think that well done visual novels with choices can be real games. They are like very slow and deep role playing games like Gothic or The Elder Scrolls.
Harem-VNs are mostly not games, but rather books with addons. But if I have a complex game with several love interests I wanna hook up, but they are partly mutual exclusive, then it is like playing Gothic: If I join up with the rebels, I cannot join the Paladins, but how can I still get this and that from them? This visual novels would provide good reasons to replay them again and again in order to reach different roles.
Let me repeat: I like your VNs, they don't need any choices to be good.
But additionally, I do like making choices that matter in a VN in order for them to feel much more personal than most books can. Not that this is impossible, but you have a stronger handle if you allow the users some free choice. If one identifies with the main character it becomes a emotional decision: "Do I really allow 'myself' to sink so low in order to see this scene, or is 'my' pride more important?". Without choices, this question also may comes up, but only on a second level, if the reader stops and thinks for a while. Then, the decision is made for him. But If it is the user who decides, it is him to blame, it falls back on him, it is his lust that let the main character make such a lustful decision.
Of course, this is some exaggerated point of view, but I don't think just saying choices and VNs don't fit together at all.
One very good example is Our Red String: How do I get Lena not to get bankrupt, but also keep her pride? How can I let her be willing to take the photoshoot? Which guy feels like the right match for her? Or am I horny enough that I want to see her with the wrong guy instead?