Don't know why? Let me explain again and perhaps help the new member in the forum.
Point Guard shoots alot because you give it space to shoot alot. Main factors being that point guards in general have good speed, good jumpshot and quickness. THis results in CPU outplaying you with a pointguard. NBA Live 07 has no PG dominance, but it has CPU dominance (which means the issue is same against any player in any position who has similar skills (good jumpshot, speed, quickness etc))
Sadly you cannot completely eliminate the issue. You can however improve it. Decrease game speed (to 30-38) and increase User defense assist slider.
Computer calculates whether it has alot of open space through a radius around the player (and it affects both sides, aka you've seen when you youself have shot a jumper that was nearly blocked yet Albert says it was wide open), which is way too small. Sadly, it cannot be made bigger for the algorithm to take into account.
This is why defensive assist will help since it will hold your player closer to the player with a ball making it harder for players with good speed, quickness and shooting or drives to take advantage of it.
It was named 'point guard dominance' because people usually guard as a player against a point guard, who begins CPU's offense and merely is the first one to see the open opportunity. It's not CPU issue directly, it's a player one (there's no such -dominance- in CPU vs CPU games)
Try reducing game speed and increasing user defense assistance, it get's better and in time the issue disappears as you will be able to handle computer with no matter whom you guard.
I hope it'll work out for you
