There is no such thing as a non ridiculous harem path.
Its premise is literally every character falling for the protagonist to the point they even forego any kind of personal preferences and needs.
It's honestly weird how some people think harems are a real possibility that the average woman would consider, if only the guy were hot enough and rich enough and had a big huge wang. Last I checked, the research on cheating demonstrated that women cheat mostly when they're unhappy whereas men cheat regardless of how happy or unhappy their current relationship is. It really puts it into perspective. Most men see every single woman simultaneously as an opportunity for sex (and more, ofc, but usually just sex if they're not in love) whereas most women just want one great guy to give them all their focus and attention and love; other women would just get in the way of that. However, once it becomes just an exchange of sex and/or money, then that goes out the window because the woman isn't looking to be romantically satisfied in that situation. That's why a 'harem' makes sense on the corruption route and not the romance route.
I mean, does anyone seriously wonder why basically EVERY harem in history had eunuchs guarding them? Or why the harems were very strictly controlled in terms of freedom? I think it's obvious to most people. Sure, to guard from rape ofc; but I think the main reason is actually because none of those women were truly there by personal will and none of them were being romantically satisfied (meaning they would likely try to cheat if they thought they could get away with it). If they
were there by will, it most probably wasn't for love except for the naive or manipulated, and if they
did actually get anything out of it, it was security and maybe political power to some extent. But almost never true love. There's no way one man, no matter how great he is, can ever satisfy that many women at once. That's a religious fantasy created by men. Harems just aren't for women; they're for powerful men who treat their women like a resource to guard (in the real world, I mean).
Anyways, I went on a tangent. I think the majority of people who want a harem are aware it's not realistic, but I think they miss the fact that a romantic harem would be jarring and just not fit well with the direction FiN has taken. I like harem content too, btw, but it's very much a more fantastical hentai move rather than a more-or-less grounded VN.