It may surprise people here, but there are teenagers who set out with 10-20 year goals like "I want to found a startup / be a CEO / have my own venture fund / etc" and then make every educational/career/relationship/lifestyle decision in that context.
For most people we want to work on interesting projects that pay us enough to live the lifestyle we can enjoy.
I think this is why a lot of successful founder types come from upper middle class backgrounds. If your dad is a mechanic then "being good with computers and going to college" is an aspirational goal.
If your parents were first in their family to go to college then "go to a nationally known college and working at a Fortune 500" is an aspirational goal. If your dad went to an Ivy and runs his own business then the aspirational goals you have instilled in you are much higher.