I have just recently entered into shooting organized matches, the IDPA and USPSA. I've met a lot of people and they claim that they don't clean before a match or clean the gun after every range use. In fact, one fella claimed that he went 4,200 rounds before he cleaned his 1911, that's when the gun acted up. He did it as an experiment.
What about the "inspection" factor?
I always clean after shooting, and have found 2 of 3 of my gas rings on my AR bolt were gone. It still fired, but I was able to replace the rings before I fired it again. I've found loosened sights as well. I guess I could just inspect them, but as long as they're apart....
Giving the gun the proverbal "once over", should be done at regular intervals, not just when you clean it after shooting.