The ones who plan all this do it for the grater good - that's what they believe. They want to advance mankind by optimizing the population, they are still the same old eugenicists. One day they will release a virus that shortens the lifespan and the replication of unwanted genes. Technically, it is already possible to do that. Or it was done already, and they wait for the best moment to release the virus. To create humans that can conquer the universe, they need advanced medicine and gene manipulation. They also want to get rid of aging factors in their own DNA. This is why they do these huge trials for the new delivery vectors (mRNA and viral vector).