I am a couple of games away from finishing the entire Rance saga, and it's quite interesting to see the contrast in how differently girls are treated in every adult game.
In LiL we care about their well being, and in other games their feelings don't matter to the point where you actively want to hurt them just so you can jork it.
When I'm playing as Sensei every girl matters, but when I'm playing as Rance the instant I see any moderately attractive woman I do everything I can to fuck her even if it's against their will.
So what prompts you to care in one scenario and to not care in the other?
Being the eyes of the protagonist, are we swayed into adopting their mentality?
Is it because the author tells you to care/not care?
Maybe we are just puppets that dance according to the rules established in every different reality, without even realizing it.
The goal of Rance and most other games is to jork it and rape as much as you want,
but what is the goal of LiL?
To make you grow as a person?
To make you accept yourself?
To break you?
Or maybe it's just another game to jork it with extra steps?
I'm not much into big words, so I'll try to keep it short. It's because of the perception and expectatives the game sets. In both cases you start as someone guided by their instincts. But, and I like that you mentioned Rance, both games start to deviate from the formula little by little. You see it "more quickly" in LiL because the update time is short. But (apparently due to the writer changing sometimes) you can also see that gradual shift in Rance.
Of course, since Rance is mostly a game in a wider world, it's hidden beneath the lore and the story of each game, but Rance's priorities slowly shift, though his core stays the same
(though you could say he did change his priorities a little bit, after dying). That could be said to be the difference between Rance and Sensei, since while Sensei's priorites slowly shift, the goal (to me) is to change his core (a goal which the broader environment he inhabits takes a special interest in), while Rance is gradually changed by his own actions and his environment, though the latter doesn't really hold him in any special regard
(shut up Planner, you were overruled, you can't kill him).
LiL can be used to jork it, I'm sure there's a few persons like the one depicted above that do, and I'm sure there's people who can't really find material or sufficient downtime to actually do it, or bother to do it. I think that, like all games, it just tells a story. And like all stories, it's up to you whether to hold it in any kind of regard, or just consume it as such stories are meant to be consumed.
Callously.