I agree. Many people are imagining, "instead of using his vast wealth to fix the world, he dedicates all his money and mental energy to an elaborate bunker that will ensure his survival in a specific apocalyptic scenario he believes is likely to happen."
It might be more like, "amongst all the random wealthy-person shit he's bought, there are guns and motorcycles (because he thinks they are cool) as well as a pantry full of canned food (because everyone should have an emergency kit and you never know).
But I could be wrong.
In this scenario, why is the reader "letting" their daughter do anything?
Presumably if she's old enough to have sex and get pregnant, she's old enough to give consent or withhold it. (If she's too young to give consent, then the sex should be forbidden and prevented based on age alone.)
How come the question is not, "You and a Palestinian are the last people on earth. Do you reproduce with each other?"
Nope, the question has to include a creepy paternalistic attitude towards a hypothetical innocent young girl under her parent's control.