I reckon your parents experience is totally reasonable - up to a certain age, they're your first call for any questions you have in life about literally anything. It's not until you've gained enough of your own experiences that you can make a judgement about what they've told you. I'm not sure it should take you up to your mid-thirties to learn these things, but hey, everyone's different.

Of course. I was answering as to why some people might have had the expectation of indefinite employment at some point, which in some places was somewhat justified until recently.