It's no secret that in today's NBA one's ability to score and create offense has become more of a premium than one's ability on defense. Compared to the days of yester-year when defensive specialists held more of a place in the game, if a player has little to no ability to score or facilitate the ball, they won't last long.
Few and far between are the Tony Allen's of the NBA nowadays. In a league where almost all 30 teams average upwards of triple-digits (100) a night, guys of that mold might as well be creatures of myth soon enough.