Your are correct - DRC and convolution is not for the faint-of-heart. And, it certainly would be of no use in competitions. So, I agree that the approach is not for everyone. But, if someone really wants to get an understanding of acoustics, digital signal processing, and measurement, then this will do it.
If one has a computer in his car, then his music can be processed realtime, and doesn't have to be converted in advance. With no car computer, he can get the same effect by pre-processing his music.