It's not 'of course' though, plenty of speeders don't get caught because they're doing 80mph down the barely used 60mph B Road to work, whereas the ones getting caught are doing 50mph through a frequently camera ridden 40mph section.
I used to spend a lot of time travelling between Southampton and Dorchester. There was a section that dropped from 60 to 40 and I adhered to that religiously, because they put a van there so often. I would get tailgated all the time, dodgy overtaking etc. I wouldn't consider those people unlucky, just stupid of they got caught, for choosing to speed on a bit of road that obviously had a lower limit because it was worse road and had frequent accidents.
So much is down to choosing your time and place, paying attention, good observations etc. luck is a minimal factor in my opinion, almost so much as to irrelevant. This is an opinion I've come to have since being caught a few years ago driving like an idiot, not paying attention to my surrounding, no luck involved.