This is correct we set it that way because…
This is exactly why it was done. Most users just use the default G54 WCS. In some of our video guides we show how to switch that to add different fixtures.
Vectric products do not switch the WCS for you (they have no ability to do this) so when you start a job it will run on whatever the last WCS you have picked. Changing the default behavior in Fusion was done to mimic this behavior.