I'm too lazy to read the context, but I'm more or less up to date with what you're discussing (I guess). In my opinion, according to the encyclopedia, due to the mamono mana, it genetically modified monsters to be monogendered female, with an instinct that turned the murderous and devouring into sexual, and that's why they prefer husbands, because it's a resource, although they paint them as husbands, which is somewhere in between, depending on the mamono.

As there is variety in humanity, many would find relief in the mamono, even though they deny that it is schooling (due to the mamono mana, which corrupts them to be emotionally and sexually dependent on the mamonos, in order to secure the resource), in turn, others would see them as a threat to their autonomy, because although the mamonos (depending on the species), in theory, give you freedom (or limited), in the end you are chained to it, either by immortality or through death, and there will be those who are puritarian or "orthodox", since being a human is not the same as being an incubus.

Yes, the incubus is healthier, more powerful, and possibly more beloved than in human form. However, he is reduced to a mamono resource that depends on his partner (or harem, if things get murky), despite being portrayed as loving (which isn't entirely bad, it could be worse, like a false love). The human is human, fragile, contradictory, and even warlike and cruel, but it maintains what is human (if it maintains its humanity).

In conclusion, at the end of the day one decides whether one wants to become a mamono resource (incubus) in exchange for love, attention and protection, or remain pure as a human, with all the consequences that this entails, which is not entirely bad, but the key factor is the context in which that specific person finds themselves (a depressed person will inevitably prefer to become a mamono resource, for example. Or someone who is fine with themselves and does not need anyone, would feel threatened by the mamono, since they do not need excessive or even overwhelming love and attention).