The above explain a certain degree of it. So does sunk cost fallacy amongst those in the general population who still cling to their covidian faith - cultists are always insensitive to disconfirming evidence.

The largest single driver, however, is greed and power. The vaxx is a cash cow, and by forcing it on society while holding people hostage in a variety of ways, a precedent is established that enables the same thing to be done repeatedly in the future. Globalists want the ability to force medicate the population with whatever they want, up to and including gene therapy to reengineer the species as they see fit. They're playing the long game.