My belief in my ability to succeed was briefly shattered by my dad's employment situation. He was a well qualified engineer laid off from manufacturing. That made us struggle.
I was always thinking about money and feeling the need to optimize for $2 meals instead of $4 meals, and wondering if my car would hold in long enough to be able to get me to school in a week. These are things that only your first, most motivated, category of people will overcome.
I didn't overcome these obstacles. I temporarily dropped out. Don't tell me that I just needed to believe in myself more.
My story only has a happy ending because state schools are cheap and engineering internships are paid.