As with any other industry, the flight schools can adapt. Unlike a car racing track, where you inevitably end up back at the start line, in aviation, you can take off from one airport and land at another.
Of course, if the response is not to change the business model and to continue with touch-and-go landings at a given international airport that is becoming increasingly busy, then it would be easy to prorate things to arrive at the amount you mentioned. On the other hand…