I’m not saying “another guy” is the only choice besides some other risk or no risk.
Ah, I believe I misunderstood; I didn't realise you were drawing a correlation between "we lose the main female lead" and "another guy". I take it, now that I have a bit more context, that you meant specifically "lose her to another guy", as opposed to simply "lose her"?
I was referring to the idea the game can have risk which don't involve losing her at all; not to Rachel, or Lucas, or the hypothetical careers. The false dichotomy I perceived, apparently erroneously, was "there must be risk of losing D, or there is no risk at all", and I disagreed with that assertion. It's certainly the most compelling risk, and the easiest to write, but not the only way.
Mea Culpa.
And to answer your earlier queries, I'm one of the people who is perfectly fine having a D/Elena/Jen/Georgina multi-partner relationship, but will not be partaking in any route that would involve D being with another man (should that lock out the ability to have one of those MFF routes, or all of them, then so be it). Other women, certainly, but not other men.
And the reason why is that I'm a terrible person, and something of a hypocrite. Someone mentioned sexism as a potential reason earlier, and I while I obviously see their logic, I have to disagree, at least in my own case (I can't speak for others); women can sleep with as many people as they want, and I've never judged them for it, but if we're in a relationship, I'm their only male companion. If it's a purely sexual relationship, then they can sleep with as many other men as they like, but I wouldn't call that "sharing" because they're not mine to share. Or perhaps I'm deluding myself, and it is sexism.
I've been in several relationships which involved multiple women, but I have never and would never be in one which involved another man, because I don't share my toys. Like I said, something of a hypocrite; but in my defense, at least I acknowledge that, and don't pretend it's moral, or acceptable, or that it makes me "strong", or try to claim it's justified by biology or anything equally gauche. Flawed though I am, I flatter myself that I'm better than that.
Edit: removed a superfluous "a" from "specifically", because I only noticed it after posting, and it was annoying me.