What is Vialism, Really? A Theory About the Bishops
TL;DR: Vialism is the Bishop's Coping Mechanism to Help Dim the Pain of their Regrets.
I've been thinking a lot about the ending and the symbolism, specifically, of all of the bishops being former Banditos when, suddenly, something clicked that makes sense of a lot of the story's loose ends.
This theory seeks to answer the following questions. Why do the bishops practice Vialism and present it as all there ever was if, as many of the Clancy Tour letters indicate, it's not all there ever was? Why are the Banditos banished while citizens are smeared and brought back?
So, you're a bishop who's just turned their back on Torchbearer (TB), your guide through Trench and the only reason you've made it this far. You begin with the goal of changing the system, but it doesn't stay that way. Slowly and overtime, you recognize, even unconsciously, that TB was right, but you can't admit it to yourself because you've already cut that line and past the point of no return.