My estimated likelihood that you pose questions in order to make subliminal rhetorical points and so tend to readily project that behavior onto others would have increased, but one anecdote isn't usable data.
EDIT: Also, I see I forgot the question mark, which may have caused confusion.
After a while (days? weeks?) you get used to the real car and the racing simulation muscle memory comes back.
Apart from the cost of training, where the GT players have the advantage is that failure is not as penalizing as it would be in a real car. If you crash, you can be back on the tracks in seconds for no cost and no time in traction. If you mess up a corner you can restart.
Rather than desensitizing them to danger, it allows for exploratory driving, which, especially when combined with the amount of track time available, would allow skills to be learned much faster than in the real world.
That is to say, the learning processes for someone driving a simulator and someone driving a real car are not the same, but these approaches must converge to a common end point which is the best driving style in order to be the fastest car on the track.