Other peoples naive way of thinking

There are moments, where I feel really naive. But actually I don't understand why people say that relatively often to me. Because when I hear people on my travel speaking, I am thinking "What the fuck, you have fucking no Idea what live is like."
Like right now, where I'm sitting in a McDonald's and listening to three young girls next to me.
From two of them I didn't heard much, but from one, I heared at first something, that nearly let me explode. "I know so many people who studied with me and now only becomes a teacher I mean an early childhood teacher with the little children. I can't understand that. When am with children like that I get sick of them after five minutes and simply be exhausted" she did "Early childhood teacher" as if it is a low income job that is worthless. And I thought "well that you become so fast sick of them, don't really speaks for your personality princess".
I wasn't following the conversation for a while. When I start listening again, she said "I think even thirty is not really old. You know, you are in a better situation, you have money and can do whatever you want, you have more opportunities to travel likeI have now" that's out of the mouth from a nearly 21 years old Woman.
One Woman answered "If you work really hard yes." What told me, that she is not that naive, like the other girl. I mean, I don't know where she is from, but in Germany, you have a job with 30 have normally money for the rent and living and for a holiday trip once or twice a year. Longer trips are in the most jobs not possible. So actually, they have less possibilitys than the young people.
Actually I need to say, that sitting in the MC Donalds all the time, is kind of cool. You can buy food and drinks all the time, you have free wifi and you can watch many different people. And at least, you can have funny conversations. I had two of them in four hours I am already sitting here.
The first one, was with a man, who was playing a game on his mobile phone. He was talking to himselfe all the time. And then he asked me,if I knew the game and start showing and explaining it to me.
I don't know why he did it. Maybe he just wanted to share the game he love with others or wanted to talk. He wasn't drunk and didn't seemed to be on drugs. So I think it was just what he needed at that moment.
Later I got in a conversation with an older lady. She asked me after the time and explained that she needs to go to countdown to get her water because she can't drink the tap water from Auckland.
Then she asked me, if I am on Facebook and I told her, that I am writing a  blog. But she understood a book.
Well I didn't corrected that misunderstanding. She asked after the name and was really sweet, she said a few times, that she will search online for my book and hopes, that I can make it to publishing it.
Well I hope so too, but more I hope, that I can make it, to finish one 😂
So even when you are relaxing while your travel like me and walk every day the same street up and down and spend your money for mostly unhealthy food, if you leave your eyes and ears open, you can see and hear much.