You know how we were told in our youth how America is a place where anyone can grow up and become President.  . .
Yeah 
That's the biggest problem today 
We don't use merit based hiring for 
any kind of jobs anymore 
Unfortunately many people are totally 
unsuitable for the jobs they go to every 
day. The most widespread example I 
can think of the cashiers and bank tellers 
that can't count money and don't have a clue 
how to give change correctly 
You shouldn't have a certain job just because 
you want it. When people say that you can 
have any job,  what they neglect to add is 
that you will try to educate yourself and 
improve your ability to do a particular job 
and gain experience through an entry level 
type position that will allow you to transition 
into the particular job with experience gained 
and insight over time. If you're not suited to 
the job, you'll likely wash out along the way