The existence of people who kill themselves doesn't undercut the reasonable idea that we have an innate tendency to want to stay alive.

You don't need psychology for that. Biology alone explains it, as it does for animals who have minimal brains compared to us.

The existence of gay men and men exclusively attracted to prepubescents doesn't undermine the idea the evo psych idea that men have a strong predisposition to want sex with women.

That too is explained from biology alone. As it is in other animals.

I wasn't arguing for monogamy being innate, I was arguing for women being upset about sex under false pretenses.

You can't separate the two without changing the argument. The salient points are the sex and the fraud. The fraud alone is not what you mean because then you would include men, not just women, and frauds not involving sex. The sex alone is not what you mean either, because you explicitly exempt cases where the man "keeps his word" instead of disappearing by dawn. But the only permanent way to guarantee the man's continued presence is monogamy.

In fact, there is some evidence that women who have lined up low-status men to help them raise children may secretly seek high status men (with better genes) to actually father those children.

Most women like to be mistreated, but that is different.

* This is one of the main differences between women and girls. Girls do not like to be mistreated.

In fact, the standard explanation I've heard for concealed ovulation in women is as a support for men staying around to care for existing children, since they can't just show up during a brief period for fertilization to beget the next one.

They still can. Ovulation may not be visible, but pregnancy is.

I'm just suggesting that the innate aversion to sex under false pretenses will be a force pulling against such a major societal change that dictated that such activity was just fine.

Entirely avoided by child marriage; which you (along with many otherwise pro-contact pedos too, I will give you that) refuse to endorse.

Of course, now you mention the kibbutzim, the Children of God also made child sex work, short of child marriage. But only by setting up a comparatively closed community with shared values.