Regardless if you consider it a spoiler to 'spoil' the airflow over the vehicle (thus reducing lift) or a 'wing' to create addl downforce or both...
If the opposing force is not prevalent, specifically copious airflow volume vis-a-vis vehicle speed, then the wing/spoiler is merely a decoration. It's deployment is speed dependent for a reason... and I'm sure has A LARGE safety margin (~ 72MPH deployment and 55MPH retraction limits as I recall).
Think of it another way... You build a treadmill wide enough to accommodate a jet airplane's landing gear. You then put a jet on said treadmill and crank up speed so the jet's wheels/tires rotate as fast on this special treadmill as they would on a tarmac/runway during take-off. Does the jet take off? Of course not.
Good luck
