Trying to dismiss any dissenting opinion as an attack on Xbox really isn't going to help your argument. Many people can recognize an ad hominem dodge at this point. Also, people have every right to question the reliability of information that comes from Phil Spencer or Xbox staff on anything that might make Xbox look good or bad.
As for the actual argument, if it were some kind of universal truth that "Gamepass increases sales" then every game would be on the service and declaring that intention before launch. As that isn't the case, I think it's obvious that there are a lot of other factors involved. Exposure, market penetration, and timing relative to release, for example. What's true for one game might not be true for another.
There is plenty of room for discussion and debate on this topic. Trying to passive-aggressively shut that down isn't going to work.
You're reading too much into a simple like worded retort to one specific post that was right above mine