Not exactly. As I said, in SIM mode or Resistance mode, the two power levels match pretty closely. It in only in ERG mode that the power levels differ significantly. (Note: this is with the battery removed from the R side Stages meter based on GPLama’s work showing issues with measuring power on Shimano right side crank arms). So, I believe I do have consistent power levels inside to outside, much more consistent than if I used Stages power in ERG mode inside.
Trying to use a “more accurate representation of a watt” isn’t entirely useless. It isn’t useless for people with different power meters on different bikes, or migrating to different power meters over time. And it isn’t useless if you want to have a more accurate representation of yourself in online races and rides, such as on Zwift.