School is not for everyone.
Society has brought many of us up to believe that a person is only successful if they do well at school. Your grades must be good to get into university and you will get a good job.
This then leaves out the person who does not get the good grades feeling like a failure. In certain people this has led them to actually believe they will not amount to anything in life and just gave up.
This is very unfair because it is people judging you from their own limited knowledge. In our present society that good job is no longer guaranteed, what it guarantees is a person having a sense of entitlement to better things in life.
There are many other careers that actually pay more than the 8-5 that we all taught to believe is the future.