Traditional vaccines work, because your immune cells learn about the “key” they need, to open up the virus and destroy it.

mRNA is basically just shipping the “keyhole” instead of the whole virus organism for your body to learn the pattern. So no crazy “gene therapy”. It is just more precise.

Like, back in the day, people used maps to navigate. Now you use crazy GPS space stuff to do the same. Just better technology for the same end.