Traction control in a 1 of 1 million dollar car with tuning and R&D in it for the sake of going as fast as possible is very different than what us norms get.
I'm talking about racers that race normal everyday production cars.
Saw a wonderful video recently showing a professional driver running a Corvette around the Nürburgring. TC was blinking the whole way around, handily contributing to better braking, faster corners, and efficient WOT follow-throughs.
My experience with TC on a racetrack with a RWD production car (an amateur racing club - not professionally) was that I could focus less on precise throttle control and more on everything else.
Don't get me wrong - I learned to drive before all this mess was available. I'm just aware that there are good reasons to have some of it. That computer can think much faster than all of us, when it's put together properly. A well-built TC system is an assistant and doesn't take total control.
That being written, I had an assistant that bought a brand new Tundra that has the collision avoidance crap built in. I rode with him some, and was shocked at the annoying, blaring beeping it would do. Even with it, he ended up rear-ending someone a year or so later. My guess is he got so accustomed to letting the vehicle think for him that he stopped doing it himself.