Expressing safety concerns and having a rational discussion about a new genetic therapy is not a "nutty antivax thing", and it is disingenuous and argument in bad faith to suggest that it is.
mRNA (Pfizer and Moderna's vaccines) and adenovirus vector (Janssen vaccine) are the transfer of nucleic acids and viruses that mediate their effect by translation, and transcription then translation, respectively, of the transferred genetic material.
The FDA defines them as such: "Gene therapy products. Human gene therapy/gene transfer is the administration of nucleic acids, viruses, or genetically engineered microorganisms that mediate their effect by transcription and/or translation of the transferred genetic material, and/or by integrating into the host genome."
You may have misunderstood that I was drawing a distinction and suggesting that they are not "vaccines," which some people do. Similarly, but from the opposite point of view, you may also be suggesting that genetic therapies and vaccines are non-overlapping categories. I reject the false dichotomy.
The FDA defines "Gene therapy products. Human gene therapy/gene transfer is the administration of nucleic acids, viruses, or genetically engineered microorganisms that mediate their effect by transcription and/or translation of the transferred genetic material, and/or by integrating into the host genome."