For the same reason that an idiot like Michael Metz, chief strategist at Oppenheimer, still has his job. He began predicting a bear market in 1994 just as the markets began to recover and tried to talk the market down for SIX YEARS.
Anyone who listened to him missed the biggest bull market in history.
I agree! I didn't listen to him and stayed in the market until January 2000 (sweating bullets for the last 6 months).
But, the market (now in a bear) has been trotting out these bulls at least once a week to get us to stay in (or get back in) the market.