Basketball: Movement Vs. Zones

Jerry Krause mentions that many insist that player movement is necessary in zone offenses some of they offer include:
player 

• Players movement presents a varying perimeter to the zone defenders.
• Cuts through the zone cause the defense to contract and make perimeter coverage more difficult.
• Movement permits a team to vary its attack and test all the vital areas of the zone defense
• Defensive players cannot easily anticipate the next offensive sequence in their area. This limits the size of the sag they can make when the ball goes away from them. This in turn gives the offensive team more room to penetrate the middle of the zone
• Moving offensive players are more alert. Offensive maneuvers work better on the move and you are also more apt to rebound the offensive boards.
• A coach can design specific patterns to work against a given team
• The weaker the player, who cannot beat the defender 1-on-1 may be open via the pattern.

Krause, Jerry. Zone Offenses for Men's and Women's Basketball. Coaches Choice, 2014.