Theres a cost aspect. if you make a track thats real forgiving you normally damage the walls more, the track owners would need to repair the track more often.
And yes you are sort of looking a gift horse in the mouth, since I would race at a hobby shop track before a non hobby shop track anyday. I mean you break parts in R/C. Its just how it is, I would rather be able to fix the car right there and get back running vs. having to leave for the day.
Dont like what damage a wall does to the car? Harden the car with higher strength parts, or dont hit walls. Slow the car down a bit so you dont hit the walls and as you get better increase the speed more.
This is a driving training issue NOT a hobby shop issue.