And in that context, vaccines and anti-viral treatments, despite their obvious life preserving benefits, have created conditions under which the virus is evolving rapidly.

This is complete BS.

Antivirals only drive mutations that decrease antiviral efficacy. In the case of Paxlovid, a protease that isn't inhibited by Paxlovid.

Vaccines don't drive immune evading variants any more or less than infection-acquired immunity. The virus doesn't have any way of knowing what the source of immunity is/was in a host it's replicating in.

I think what we're seeing is the reaching of equilibrium. The virus' evolutionary space isn't unlimited and in the US we're seeing most recent waves are more like ripples.