Rid, do you mean never were an EMT as in they went straight from layperson to Medic, or that there will be Paramedics who never had the title EMT-P? (Sorry, I'm just a bit confused).
I think the point about LPNs and RNs both being called "nurse" is a good one, however I'm not sure you can apply it to EMS providers for one main reason. People often encounter EMTs and Paramedics at the same time, in the same place. ie an EMT and Medic show up on an ambulance. Calling them both Paramedic when they can't do the same things I think would cause a lot of confusion. Say the titles were changed to Basic Paramedic and Advanced Paramedic, I bet people would just end up being referred to as "basic" and "advanced" rather than paramedic.
In the cases of LPNs and RNs in my experience you don't usually encounter them at the same place at the same time. ie, I've always seen RNs in the ED, and LPNs when I've gone to the doctor. You don't expect the nurse at your private MDs office to be able to do the same thing as the nurse in the ED. Or at least I don't.
Imagine how confusing it would be for patients if there were both LPNs and RNs working in an ED, and both were called nurses.
"Hey nurse, can I have some more nausea medicine please?"
"Oh yeah sure, let me go get the other nurse who can give it to you".
"But you are a nurse"
"Not the right type of nurse"
Direct example, but I'm trying to be clear about what I'm saying.
I've also noticed that the scope for LPNs varies by state, for example some allow LPNs to start IVs and others don't. Whereas the scope for RNs is much more generalized and more likely to be restricted by where the RN works rather than their state (an ICU RN is going to have a different scope than an RN at an nursing home is what I'm talking about).
Anyway, hopefully I've made some sense with what I've been trying to say.
I personally don't like the EMT designation, I think it's a misnomer for the current scope of practice for EMTs. Right now I'm failing to think of anything that would be a decent replacement.
To be brutally honest, most of the health care designations annoy me. There multiple groups that provide similar levels of care, and all have different names. For example, the CNA vs MA vs LPN**** There are also some names, like Physician's Assistant, which really don't do the profession justice, are misleading, and are unclear.
**** Where I used to work an MA had a larger scope than an LPN, not sure if it's like that anywhere else.