You don’t know that they will be less virulent. You’ve been told that is the usual pattern with influenza like viruses. Covid is a coronavirus, not an influenza virus. Different viral family altogether.

The latest variant is a recombinant variant. They’re calling it Deltacron so far. It combines the virulence of Delta with the transmissibility of Omicron.

So there’s your theory about weakening virulence being a given shot to hell.