I think writers probably spend more time thinking about tricks for avoiding procrastination than, say, binmen. If you're a binman there isn't much procrastination you can do - you get up in the morning, drive your lorry, pick up the bins and take them back to wherever it is binmen take bins to. If you don't, you get fired. For a writer, the schedule of a days work is much less well-defined and, probably more importantly, the deadlines tend to be much longer. Whether writers spend more time thinking about procrastination than, say, freelance web-designers is a different question.

I certainly spend much more time procrastinating now that I'm trying to write a PhD than I did as an undergraduate when I had exercises to hand in each week - currently my only 'deadline' is to finish in about 3 years, which seems much too far away to worry about. Probably the fact that writing is a profession in which procrastination is an option combines with jimrandomh's point to produce the effect you're talking about.