Is it though?
An aircraft in flight is really just a ballistic body in orbit around the planet. Albeit at very low altitude. To overcome the drag of the atmosphere we have added an atmosphere effective thrust system and to reduce the required speed to overcome the gravitational effect we added an atmosphere effective lift mechanism. For all intents an aircraft is just an orbiting bullet with lifting wings to overcome gravity and an engine to overcome drag.
We maneuver the aircraft by directing airflow with control surfaces. Directing the airflow creates a thrust vector and changes the shape of the lifting surface allowing for directional control and orbital distance adjustments.
The space shuttle is still just an airplane with reactant thrusters. Once the effect of drag from the atmosphere is eliminated, the need for continuous thrust is eliminated. Without atmosphere we need to replace the passive control surface with an active control that generates thrust vectors for direction and orbital distance management.
Other than the structure required for reentry and the ridiculous thrust required to get out of the atmosphere in the first place, a plane is a plane. The physics are really very similar. throwing a baseball on earth is governed by the exact same physics that keeps the moon orbiting the earth or an asteroid transiting the solar system.
If you reduced gravity and atmospheric effects in MSFS you would have a space simulator.
