I can agree with that to a certain extent, but adults who are speaking the truth in order to be helpful to someone younger tend to choose their words more carefully.
I can attest to this. If ever a student comes to me for advice, I'm careful with my words.
Truthful, but still mindful. I want him/her to learn, not to turn away from what I say.
Most "real world" statements I've heard from people have been about things that they could have done differently if they really wanted to, but they present the facts of their current lives as an inevitability instead of owning the choices they made or admitting their regrets. Adults who talk that way are merely complaining, using younger people as an outlet for their frustrations.
I believe this is not just limited to adults. Even younger peeps tend to be dismissive and eager to prove to adults that their 'ways and beliefs' are better than the older peeps.
I mean, yes, there are concepts and situations where it can be applied, but they (adults and youngsters) can be kind with their words.
Harsh statements--even if they are useful--gets thrown out often. No one wants to be rubbished, except the masochists, maybe?
It's rude for an adult to make such a statement without offering to help prepare the child for such things. Children encounter new problems just like anyone else. They ask for help when they feel frustrated or afraid, and adults also ask for help when they feel overwhelmed. Some adults pay other people to do their taxes, while some sit down at a computer with Mom and go through TurboTax® together.
One thing that I think everyone has to learn is that, every guy/gal out there has a different take and different experience on their lives.
Problem with most adults is that they often go 'one size fits all' belief; like "I did this and it worked for me! Why can't you make it work?"
Problem with most youngsters is that they feel superior in every aspect, compared to 'boomers'.
Solution? Be open with people. But yeah, it might be hard on others.