I don’t understand your point. It’s a vaccine, you get vaccinated, your body produces antibodies, your risk of catching the disease goes down, your risk of ending up in hospital nearly disappears
Anything is possible when you decide to change the definition of what something means. The CDC used to define “vaccinated” as “the act of introducing a vaccine into the body to produce immunity to a specific disease.” They changed that key word in the definition to “protection”, so sure if you move the goalpost on what something is, you absolutely can call this a “vaccine” and not an MRNA treatment!
It's not currently possible to be vaccinated, and calling our current treatment a "vaccine" is incorrect.