Our immune system is used to fight foreign substances (pieces of virus & bacteria, but also classic vaccines which are also pieces of those or dead viruses), but not your own cells producing pieces of a virus. Your own body cells become an enemy. This is completely new and has never been tested in humans (it is actually tested right now) and nobody knows what can happen long term with such an approach. It might end well, but it also might end in a catastrophy. What is already seen now is that the mass vaccinations create those new mutants (so called escape mutants) which make new vaccine generations neded. So it never stops, like with the yearly influenza. Good luck with getting regularly gene therapy shots, instead having your immune system fight the virus by itself!
And by the way, data show that once you got Covid-19, you will have immunity for a LONG time. But the pharma cartell doesn´t like this idea.
https://www.nytimes.com/2020/11/17/health/coronavirus-immunity.html
https://abc13.com/covid-immunity-studies-how-long-does-protection-last-booster-shots-vaccine/10703071/