In most Star Wars battles, the ships shoot lasers at each other.
In Rogue One and RotJ, however, ships physically colliding with other ships won battles. In Rogue One, a capital ship collided with the planetary shield, deactivating it.
When an opponent comes at you with a space fleet, why doesn't a space admiral take an unarmed, unmanned hunk of metal and hyperspace it right through the enemy? Why do they just mess about with little lasers?