I regularly listen to some NASCAR podcast and they say that the race previews usually consist mainly of crashes. In other words, while a lot of NASCAR fans might like crashes, the promoters don’t do anything to curb that ‘guilty pleasure’, rather vice versa.
I personally don’t see anything wrong with crashes although I don’t think they should be used disproportionally when trying to promote the races. Crashes simply belong to motorsports, just like falls belong to figure skating. You don’t watch figure skating to see the sportsmen fall but it would be nonsensical to turn figure skating into a boring parade just to prevent falls at any cost. The important thing is that nobody gets hurt.