You've hit the nail on the head. There is a divide here that is quite clear if you stand back. (For this post I'm going to assume that everyone that says they trade does so).
On the one hand you have the predictors (DP et al). Although these guys make calls they don't seem to share their methodology. They make money but predicting the future is hard. If a person can make more good calls than bad calls over the course of their trading career (and use good money management) you can make a lot of money.
On the other hand you have the reactors (NoDoji and DBP). They don't make calls, probably aren't particularly good a making calls and don't care about calls. They watch the price action unfold and trade in reaction to what happens. I personally believe that this is an easier approach to trading.
Now the predictors have worked and continue to work very hard to trade the way they do. In addition when everything boils down to being right or wrong it either builds your ego or destroys it. They are successful and they can't believe that there could be a different way to doing this.
The reactors, on the other hand, don't care what the market does. They don't feel right or wrong if the market goes up or down. They try to keep their ego on the sidelines because that little guy doesn't help with this style of trading.
I suspect that most beginning traders and most failed traders start off as predictors. All the objectors in this thread shouting for DBP to make a call ahead of time are missing this distinction.
Mostly a matter of ego.

