There is no doubt that if the rules were just thrown out that limit the performance of the cars, they would be beyond what a human can endure, and be approaching simply insane speeds. Full active suspension, traction control, ABS braking, and the rest would make a crazy fast car and kill a lot of drivers. So the rules dial back the performance a lot. Look at what Porsche did with the 919 car built for endurance, remove the restraints and they have times at Nurburgring unlikely to be broken.
https://www.motor1.com/news/250630/porsche-919-nurburgring-time/