I'm not sure genes work that way. It is no longer a natural selection process; those genes won't be weened out quite like hundreds of years ago. The only way I see it as possible would be to also introduce gene correction - and religious folks don't like people playing God.

Edited: And yes, environment plays a role in development as previously pointed out.

I guess the God fearing folks don't like the idea of playing God. It's only a matter of time before a culture or country starts correcting genes to create a more well rounded diseaseless as possible people. Anyone think China isn't already on top of this? It's already been done before, rogue scientist or not (HIV immune twins). Yeah they have a decreased lifespan of 20%, but the proof is there. If CRISPR mutates inert genes though, that could prove problematic in the future evolution of humans.

Not sure people lived long enough back then to be familiar with autoimmune diseases that generally affect people near 50. Only a 50% chance of living to 50-55. Not the best odds. (Though autoimmune can span any duration of life, no doubt)

I'd bet money the average age of death is drastically reduced after recurring Covid infections. If you consider it's a vascular disease, and the side effects that are reminiscent of trauma, repeated trauma leads to prematurely mortality. Thus, repeated Covid infections would in theory do the same.