Do people ever take a prerequisite course to accounting school, advertizing school, nursing school, etc?
Why do paralegal instructors not tell people they should work as a paralegal before law school?
Why do doctors not have to work as a PA or medic or nurse before medical school?
Answering my own question:
Because many EMS instructors are products of vocational education.
You have to work as an apprentice before you are a pipefitter, mason, carpenter, etc.
Is that what you want to be? A skilled tradesman?
They preach be comfortable as an EMT first because most of them struggled like hell to pass paramedic class. All that book learning stuff you have to memorize. Most medic programs are ranked as a sophmore level college course.
So if you went to EMT trade school (did that myself) and found yourself in a sophmore college class with no prior academic work (didn't do this myself), nobody should be surprised you found it very difficult. It might even be the toughest thing you ever do in your life.
If you are academically inclined, you will have no problem with paramedic school.
Be extremely suspect of anyone who says you need to work as an EMT before going to medic school in the US.
In the words of Leonardo, "Poor is the student who doesn't exceed his master."
Strive not to be a poor student.