This 'through' method gives you the ability to manage the generated power in the after-movement. No need to worry about a big opening when missing because the next one is already underway at 100 mph ;). So, there's no waste of energy while using the momentum to set up other techniques, which can also be defensive ones. Also, take a look at the way I'm holding it: the ring grip, holding the bat like a shackle. Understand that there is no opponent involved, no context—just demonstrating one strike