Bridge lengths have more to do with line of sight than anything else. Players who stand low have longer bridge lengths because it enables them to see the line of the shot better. Players with short bridge lengths usually stand taller. Both types of players stand the same distance from the cue ball, it's just that one stands more upright.
Remember: Just because a player has a long bridge length, it doesn't mean they have to take the cue back to their bridge hand every time. They adjust the length of their stroke based on the needs of the shot in front of them.