You've literally just given the perfect example of why iRacing physics are bad. A slide is correctable in real life (else drifting would not exist). The fact that iRacing falls apart, the same as rFactor which everyone knows has bunk physics (the devs themselves do I'm sure) seems like an extremely obvious reason as to why the physics are broken.
As well, the "yay iRacing" camp seems to think that icy feeling and lack of grip is "realistic" is as far from the truth as possible. If real life was like iRacing, I'd slide off into a ****ing telephone pole trying to turn a 20kph corner.
If they can't get slip angle physics correct, why would you believe that any other part of it is even close to correct? It's obvious flaws in their fundemental approach.