Yeah, that could be amazing.
I always go back to Forza, especially Forza Horizon, because it is another Xbox Studios produced, massively online multiplayer vehicle sandbox. You can build a career as a car skin painter, or in the auction house, you can focus on drifting, street racing, track racing, off road racing… etc.
Within the community, there are sub cultures for each of these career paths. Some are ridiculously passionate.
Forza Motorsport (not Horizon) has a more traditional racing career path. You win races, you win money to get better cars and upgrades.
Many, many other racing sims (more sim than Forza’s simcade) have career modes. It is a perfect fit for the genre.
Microsoft Farm Simulator is very much career based (and a weird corner or simulation).
American Truck Simulator and European Truck Simulator (NOT made by Xbox Studios) have something brilliant and I confess, I drove for hundreds more hours because of my career than just for the joy of driving alone. You got to buy your truck and upgrade it. Then you ran a trucking business so if you bought a second truck you could hire a driver, and so on. Soon, you have a fleet of trucks and multiple branches across the continent. And all the while, you keep driving your truck from A to B.
Train Simulators have their career modes too.
I mean, we have the whole freaking globe, and I really think there is an untapped wealth of casual simmers who just need a bit more motivation to fly in order to become hooked, and turn that corner into becoming a core simmer.
Forza Horizon fills their world with activity, and it is fun, addictive, and gets people playing for dozens or hundreds of hours, but folks can always just turn that all off and cruise from A to B whenever they wish.
I know Forza is more arcade oriented than MSFS, but there are simulation ways to incorporate a vast, living online world full of jobs and activities into a massively online, multiplayer flight sim like MSFS. As it stands, ther world is almost too vast, and it often feels like there should be more to do within it than just flying from A to B and learning new computer and steam systems in airplanes.
The more alive and active they can make the world, the more casuals will want to stick around and really learn how to fly.