My opinion is not that you should not be able to spend time as an EMT before paramedic school. My opinion is that arbitrary entrance requirements are not the right approach.
Why aren't paramedic programs enabling students to get their sea legs underneath them?
Why aren't they ensuring that graduates can function Day 1? (we'll ignore the silly parts like radio operations, etc)
Or perhaps the other question, why are they allowing students graduate who can't function on Day 1?
And this is the heart of the problem when the topic of experience/no experience comes up.*
I'd guess that nationally there are few, VERY few schools that have a truly appropriate amount of both clinical hours (to be spent in a hospital), and field internship time. Few as in less than 5. Maybe only 1.
Nobody has ever, in the history of American EMS, made a decision on how much time should be spent in the field during school based on any real empirical data, or even observational data. It's nothing more than an arbitrary number that is far, FAR to small.
Hell, a lot of time it's even less than it used to be 30 years ago. This despite the major changes in medicine that have come across since then, and the changes in what even the most simple-minded paramedic can do.
What's the current requirement for clinical and field time now? 200 hours of each? 400? Wow...how strict. How wonderful. How stunning that someone can spend the equivalent of less than 2 months fulltime work in the field and become a newly minted, fully qualified paramedic. Even if they'd never seen, much less interacted with a patient or the general pubic before their internship.
Pathetic.
And yet there seems to be this consensus that all that is required is a few weeks of ride time and a few weeks of shadowing in a hospital (calling it shadowing is given it more credence than it often has).
Maybe someday every school will have a really appropriate amount of time spent working with patients and actually putting into practice everything that is learned. But that is a very big maybe. And until that happens, the debate about getting experience or not before paramedic school will continue.
*For the record, getting experience or not is a very individual decision that needs to be made taking into consideration multiple different things specific to both the area, and the person. Some can do fine without it, some may need it.