From AP article:
NASCAR called Stewart's comments "very, very disappointing."
"NASCAR has been running races since 1948, and we place the safety of the drivers at the top of the list," said spokesman Jim Hunter. "We have more people and more resources than ever officiating our races. The safety of the drivers is our first priority. It has always been that way and will continue to be that way.
"There are thousands of talented race drivers out there who would consider it an honor to compete in the NASCAR Nextel Cup Series."
IMO I think Stewart is wrong. Races like the one one in Phoenix can easily occur where you mostly debris cautions and only a couple of wrecks. He should apologize for his remarks.