Why? Own a musket for home defense, since that's what the founding Titan intended. Four ruffians break into my house. "What the devil?" As I grab my powdered wig and Kentucky rifle. Blow a golf ball sized hole through the first man, he's dead on the spot. Draw my pistol on the second man, miss him entirely because it's smoothbore and nails Sasha. I have to resort to the cannon mounted at the top of the stairs loaded with grape shot, "Tally ho lads" the grape shot shreds two men in the blast, the sound and extra shrapnel sends 15 meter titans in Shiganshina to the Corner of the wall . Fix bayonet and charge the last terrified rapscallion. He Bleeds out waiting on the Military Police to arrive since triangular bayonet wounds are impossible to stitch up. Just as the founding Titan intended.