How are you supposed to know passion at 18? I do alumni interviewing for my college and most kids have no singular passion they want to pursue (and more often than not, they are hoping college will help them find that passion).
And I don't blame them. Finding a singular passion to center a degree around at a young age is not the norm. And yet we put a lot of pressure on our kids to be specialists before they're even able to vote. It's a very difficult situation to put children through.