That's a bit different from your initial point. Altering the driving challenge is surely part of driving. It is still the drivers ability and skill as a driver to adjust the car as they go along. It's not like when the TCS and ECU was programmed to sort the car out before the driver had to.Changing settings alters the setup which alters the driving challenge. Remove them and let the drivers 'drive'.
The year 1991 was the best year for F1. Take a look at Senna doing the pole lap at Monaco 91 AWESOME..
"How do you define real racing skills?" again look no further then Senna and the MP40 driving one handed most of the time.
Do you think today is worse than Schumacher's heyday with regards to driving aids? My racing skills question was mainly to illustrate how the skills to drive in F1 have changed. I don't want this to turn into a "who is more skilled" derailment though. I just believe the drivers today are less reliant on gizmos than they have been during the Schumacher epoch.