I appealed to a broad range of cultural facts (including state law in Joseph's day) which do not fit our later, presentist assumptions as a society. You carefully ignore the impact of very different societal norms -- which do change over time.
Presentists pass absolute judgment, as you are doing, on the actions of past peoples. Anthropologists don't. Historians don't. They describe people as they were, warts and all. This is especially difficult for fundamentalists and literalists who read the Bible and are shocked by the horrors to be found in Holy Writ -- often attributed to God. Why are you afraid take people as they are?
You are quick with accusations, but slow on the uptake on the infantilization of youth -- which entails treating teens as babies, instead of giving them responsibility. You claim this to be "abhorrent" only because you deliberately misinterpret the concept. It has nothing to do with your personal need to see it as sexual. It is rather the observable fact that young people raised with real chores to do, as a real part of the community, somehow mature more quickly -- whether living in a paleolithic group or on an Israeli kibbutz.
Those are indeed our modern problems, which you use to attack a convenient and innocent target -- rather than simply understand in the broader historical context. That is true hypocrisy.
As to politicians, you probably need to apply a Machiavellian interpretation to their actions. It's all about power, Ben. It always has been.