Of course, exactly where the scientific view of life leads people: we're animals; we are at the mercy of our biological forces. This is a new idea on planet earth -- even the old pagans knew better. But Science is King even if it's only had that power for a couple hundred years if that, and knows it's right about everything.
This is precisely NOT what is being suggested. We are not "at the mercy" of our biological forces.
We are, however, heavily influenced by them. We had better understand that and understand to what degree.
Then, if we wish to prevent undesirable outcomes, we should understand how best to deal with those biological forces.
We have conducted, over the centuries, a number of rather careless uncontroled experiments in how best to influence people's behaviour for the better.
We have, more recently, conducted somewhat better understood experiments (different places, different approaches,different times) and have some ideas of what works and doesn't.
Abstinence only does NOT work. However, that doesn't mean that one shouldn't point out how safe abstinence is and how picking your time and partner carefully can have significant emotional value as well. It is just clear that trying to give ONLY that message is a failure.