Why do some people believe they're destined for a specific fate, like dying young, even without any clear reason?

I’m a teenager in high school and I want to become a criminal lawyer/attorney in the future. What are some recommendations?
Why do therapists maintain boundaries about thinking of clients outside sessions, and how can I cope with feeling hurt by this?
Why do young people often look up to wealthy celebrities, even if they're not truly happy themselves?
Could there be physical phenomena occurring around us constantly that human brains simply did not evolve the sensory equipment to perceive?