Even if it worked that way, its a poor filter since the IFR is only 1% and it mostly kills people that are very old anyway. Plus ideologies aren't genetic. And even with genetics the whole "evolutionary filter" concept fails due to reversion to the mean. Plus it is a fundamentally right wing political concept. "Evolutionary filters" are about as scientific as the antivax movement.
It doesn't need to be perfect nor does it need to kill to be effective. You can negatively impact the fertility rate just by diminishing the quality of life.
On the contrary, we have a great public health experiment underway that will be dissected for years to come. Hospitalization rates, medical bankruptcies, prevalence of long COVID, birth rates, excess deaths, etc. For science!