> I promise when I’m old, I will not have this attitude.

To my ears this is a hilariously naive statement. It sounds to me to be roughly the equivalent or a 7-year old saying "Adults have boring jobs where they sit at a desk all day. I hate it. I promise when I'm old I'm gonna be an Astronaut or play Major League Baseball."

It's not that they don't mean it, it's that one should make promises about a situation they can't yet understand. While some of those kids probably did end up being astronauts or baseball players 99%+ who made that promise didn't. It turns out that being an adult gives them perspective that helps them realize the reasons they want a desk job even if they don't like it, or for many they actually enjoy their desk job (ex they like to program).

So the same if a million young people all thought similarly, and then magically changed their view when they got there dont promises your going to be the one who will break the streak.

You might turn out to be an astronaut, but many people listening, based on good previous evidence will rightly assume you won't.