Thre is a lot to unpack here.
Well, it all depends upon your priorities and whether they are God-centred. Far better to learn God’s laws when you are young (Remember now thy Creator in the days of thy youth, while the evil days come not, nor the years draw nigh, when thou shalt say, I have no pleasure in them: Ecclesiastes 12:1 - KJV), than spending the whole of adulthood trying to correct bad habits and practice.
As someone who was taught Christianity at an early age, I can tell you not all that I was taught was true or even worked. One of the reasons I started looking at other religions was because my teaching was so narrow.
A wider view of the world, with many different viewpoints highlighted, can help people understand other people better.
It is the responsibility of parents to teach these things and explain why they are important. Effective parenting should mean that your children never have an opportunity nor find it appropriate to go alone with members of the opposite sex where they may be tempted to sin, especially to engage in sexual sin.
Most parents do feel this way, but not all. Most know about their kids seeking out because they did it. Would it be better for those kids to have the tools to handle a sexual experience if they want to have it? Rather than having it in the back seat of a car in a quick and painful way.
The whole western dating system is not biblical, if we think it is acceptable to leave a young couple alone to be tempted to sin, e.g. in the back of a car. Things are far too lax these days.
The whole point of the church is to be different from the world and it’s practices.
The whole church, not just parents, has a responsibility to chaperone these youngsters until they are married.
It’s also about teaching youngsters about the sanctity of life and how our bodies are temples for the Holy Spirit (‘Know ye not that ye are the temple of God, and [that] the Spirit of God dwelleth in you?‘ 1 Corinthians 3:16 KJV)
So what? Not everyone can do the straight and narrow path you are taking. And not every teenager can either. It would be better if they knew all the paths and had the tools to help them make their own choices.
Purity and treasuring one’s virginity are beautiful characteristics that are, sadly, no longer cherished in, even, many churches today. However we are all responsible for modelling and encouraging chastity in both young and old who are unmarried.
It is appalling that, as a society, we rubbish these values and encourage youngster to lose their virginity as quickly as possibly and discard it like it is a piece of rubbish that they should want to be rid of and should be embarrassed about (‘Blessed are the pure in heart, for they shall see God’ Matthew 5:8 - RSV)
To much value is put on purity, IMHO. I have known women (and men) who have had problems with sex because they where told it was bad and had problems getting over the idea it was a sin.
Sex is there, and hiding it in a closet doesn't help with the issues of it. But it doesn't need to be spilled all over the floor either.
I don't want to encourage teens to have sex as soon as possible. But they need to not look at it as a forbidden act either. It exists, people are going to do it. It is better to be upfront about what it is and what the consequences and benefits are, and how to do it safely and with someone they care about. That way they don't have to stumble in the dark and the know what is there and if they want to do it.
Young women, in particular, are being violated and damaged by these clear defiance’s of God’s law. If we engage in these sins, the bible tells us that we are sinning against our own bodies:
‘Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body’ (1 Corinthians 6:18 - KJV)
Sex education, if done right, will lead to less harm to women and less unwanted babies. Maybe not by your narrow definition, but looks to be an impossible goal from my experience.
Yes, these are difficult things to accept, but God tells us that the way to salvation is straight and narrow and very few people find it:’...strait [is] the gate, and narrow [is] the way, which leadeth unto life, and few there be that find it (Matthew 7:14 - KJV)
So what? That is a personal choice. And I don't see a need to ram it down everyone's throats.