Well technically they were not vaccinated. At least not in the sense you and I were vaccinated as kids. Those were proper full / partial antigen vaccines exactly like all other vaccines over the last 200 odd years. Or your last flu shot.
What the people you know got was an experimental RNA agent that was engineered to trigger the human immune system in the same manner as a traditional antigen vaccine. Not the same thing. A fascinating technology which has so far never passed the standard approval process in the past and given that it acts in a totally different way was always going to be a very difficult and very different approval testing process from traditional vaccines.
If at some stage in the future it is proved safe for use it will be a very useful technology. But so far not only had it never passed the approval process but had been nowhere near passing the approval process. Given how radically different it is from traditional vaccines the usual 4 to 6 years process would probably be closer to 10 years before one could be sure it was clinically safe for mass inoculation use.
With this experimental mRNA “vaccine” I think there may be a disturbingly high probability of sometime in the future that there will be another thalidomide style disaster. Some unexpected side effect which takes years to emerge.
Younger people may not remember thalidomide but "thalidomide " babies without arms or legs were not uncommon when I was growing up.