I think the issue is that the people writing the captions don’t understand and can’t write it down.
Obviously the producers could fix that but it would be a process change, which would take some attention from a powerful person who cares about the issue. As you imply, that seems to be in short supply.
We pushed “the guide to getting it on” on our children at a relatively early age and invited them to discuss, which ensured they would never, ever, ever ask us anything about sex.