I said adult informed consent. That precludes children and coercion. As for the rest, you could make such "yeah, but what if...?" hypotheticals about just about anyone. They're not a good argument. "Yeah, but what if everyone was gay? The species would die out!" "Yeah, but what if everyone were a stay at home parent? The economy would collapse!" "Yeah, but what if everyone wanted to live in a house? Urban sprawl would cover the planet!" and so on. Not everyone in Japan is going to become a JW, nor do all JWs shun higher education (AFAIK) so those aren't really helpful to the discussion.
If you ever listen read arguments from SCOTUS
you will see a lot of hypotheticals.
Being adult and informed absolutely does not preclude
coercion. The pressure to conform to a cult is intense.
Lo and many will die before going against their group.
And in practice, there are kids, who die. You cannot
realistically just not consder them.
Since you choose to bring up "gay", let us look at that.
Now, increased population is not in my mind, desirable,
but let us say it is.
Ten percent gay might mean ten percent slower population
growth. Maybe? How about ninety percent? No probs then?
Lets try one hundred percent. At what point is it in the public
interest to interfere with promoting a gay life style?
(assuming for the moment it can be a choice, like being a cult member)
I did not say everyone in Japan is going to do this, or that.
I am pointing to what would happen if they did.
Lets some decide to go cultist like I said. You see no
harm in it? At what point, percent wise, does the
no-harm end and the harm start? Somewhere less
than one hundred percent, for sure.