But you see, you made a normative statement. Maybe it is a factual statement to you, but they all have high power except the Kusari one.
I fly regularly past Rheinland battleships, which do shoot me. Last time I flew past one, I used 20 bots. No im not a retard, I was actually testing how accurate the Rheinland battleship was fireing at a falcata in cruise. I can safely say, pretty accurate.
The problem you defined isnt the one that is a problem here.
Its the Kusari ones being too weak.
EDIT: but yeah, I dont see the problem with you getting killed at 1500 m, because battleship cannons have a range of ~2k and those particular guns have a 1600 m/s speed. I dont see the problem with it at all. Adapt. Its what the human race did from being cavemen to the beings who control the fate of the world.
Imaging what a caveman thought when he saw his mate get killed by a lion. He thought "I with there was some way I could defeat that lion". Lo and behold, the spear or bow and arrow was invented. He didnt just give up and say he was hard done by god, did he?
pretty long winded analogy, but it works i guess.
Or a better analogy:
I cant cross a river when its guarded by a legion on the other side, so ill walk down this end of the river and wait until there's no one on the other side, then cross.
