A flight sim using an xbox controller... is not a flight sim. You dont play minesweeper with a joystick.
It's just a game... and the console controllers have analog sticks and throttles, along with gyros and a dpad that could double as a hat switch. They're fine for casual sims and some prefer them :)
Certainly a lot more couch friendly than a hotas on your lap
The one annoyance I have with Xbox Cloud is that fact that it won't pass through any controller that's not a standard one. Works with third party controllers just fine, but not a friggin' joystick, which has the exact same inputs, just mapped differently. I hate arbitrary limitations.