You guys have no clue about how these subscription based gaming things work.
It's simple...it's like EA Origin or Ubisoft Uplay.
When someone paid for a subscription to these services, they get access to A TON of games. That's exactly what they are paying for. A subscription to a service so they can choose what games they want to install on their computers. They aren't buying a subscription to just one game. Flight simulator will just be a choice within the subscription.
Also, like many have posted, anyone can go ahead and buy ant game they want outright. It's that simple.
Also, for as many smart people we have on this forum, im surprised that many of you are not seeing this for what it is....a huge advertisement campaign for the Microsoft subscription service! They are just using a brand new and highly anticipated game to lure people to actually pay for the subscription service monthly. They are most likely hoping people will see the new flight simulator title and then check out this gamepass thing and see all the other titles that are offered and then subscribe to the gamepass service.
It has been said many times a subscription is not needed.
There are a ton of people letting huge confirmation biases get in the way of logical reasoning.
Just because things may seem unclear, doesn't mean the sky is falling and Microsoft lied to us.