Yeah, I see where you're coming from.
There was certainly a lot of naivety/ optimism about what you would be able to achieve when you got older. I was pushed into a niche study because my parents etc were certain it would be possible to get a job if you just "worked hard enough".
I also worked in a few industries, storage etc. That sucked the life out of me as well.
So yeah, being told everything will turn out awesome your entire life is not a good thing. People tend to be a bit scared of pessimism, but they fail to realize you can be realistic without feeling hopeless.