Ok...
... I'll try again...
1)You are 3 feet tall, therefore you are restricted to coming out of your bunker within those three feet, as such making it easy for your opposition to figure out where you will pop out....
2)You are 7 feet tall as such you are able to use all 7 feet of your height to come out of your bunker making much more variation in your play and making it harder on the opposition to guess where you come out...
Now no taking the piss, surely that makes sense?