With respect, bollocks.
Talk about a contradiction in terms! 
I hope you're right that your dc will always be honest and safe, but I've known many parents THINK this is the case and it very much isn't
because they have earned trust over the years.
This is exactly the age at which they use that trust capital to get away with doing things and being places they know you wouldn't approve of
@nicknamehelp when I was married if I was staying at a friends I let husband know where etc and he'd do the same. He was sometimes engaging in extreme sports, wild camping etc so he also would ensure those he was with had my numbers (no ubiquitous mobiles in those days so it was home and work numbers) and on one occasion I did indeed get an emergency call as he'd had an accident and was unconscious for some time
My dd is now 20, was working full time from 16, left home 2 years ago to be nearer to workplace (shift work so easier for her), is a capable, confident and sensible adult. Has been on holiday with friends and a boyfriend overseas, and is now living in another country in the Uk to me having returned to education following difficulties at school due to the school being unsupportive regarding her disability.
I hardly think she is crippled by the way I parented!
She can and has run and lived in a household of her own from the age of 18 (well paid job for her age she was able to get her own flat rented) including paying bills and dealing with a less than helpful landlord.
It's possible to raise a child with an eye on their safety and well-being AND raise them to be competent and independent adults the 2 aren't mutually exclusive
It's a balance that has to be struck, nobody gets it perfectly right, I worry at times dd is a little TOO independent as she hates asking for help and tends to try and tackle things herself even if she has no experience in the scenario. She generally manages but on occasion I think it would have been a bit less stressful for her if she weren't so determined to handle everything herself.
Among her peers, some were raised similarly, some were coddled and yes very much actually over protected - as in not allowed on sleepovers at all, strict early curfews, not allowed to work until they left school etc and some were neglected - I'm talking parents sodding off on 2 week holidays leaving them either alone or even looking after younger siblings, not caring where they were to the point they could stay over at friends houses and the parents barely even knew they weren't home, not guiding them on friendships/relationships, drugs, alcohol etc
There's a range of parenting types
It's a case of finding a balance and knowing also what works with your child. But not all parents assess that correctly