Guess I will be the bad guy here... I like the idea of no prep racing as it is much closer to the roots/origins of drag racing, plus it takes some of the racers off the streets. I have to admit that in my youth I did a lot of street racing and loved it, this was mainly due to the fact that the closest drag strip was 200 miles away. When I eventually did get to the track, I found that a lot of the "fun" was removed due to regulations and politics. On the street, you "run what you brung" and this can result in some very interesting races; slower cars winning because the driver actually knew how to drive his/her car. I agree that the track needs to be maintained (oil spills cleaned up, etc) since everyone is going down that same strip. As to tech inspections, I would think that the officials would take a cursory look at the cars to make sure there isn't anything like gas leaks or other potentially catastrophic issues since everyone is in the same spot.
As was noted, sanctioned drag racing has been losing its audience as the newer generations have grown up with things like grand theft auto (GTA) and other games as well as the TV shows glorifying street racing. When they look at NHRA/IHRA sanctioned races, they are outsiders and I highly suspect intimidated. On the street you can talk all the smack you like and in many cases back it up even with a slower (lower HP) car if you know what you are doing. On the strip, you have to play by their rules, race in classes, etc. I can definitely see why no prep racing has become popular. I am not advocating recklessness, but at the same time if it gets people to race somewhere that has barricades, ambulances, etc, I am all for it.