Why design the enemy ink mechanic to completely cripple and block the player's already slow and clumsy humanoid character (getting boxed into your base can happen at the drop of a hat because your whole team is being blocked by enemy ink, feeling helpless isn't very fun)?
Uhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh you might as well ask why bullets kill you in shooters. It's a fundamental design decision that encourages you to be laying down as much ink as possible!
Why would you create a powerful maneuverable close-quarters melee weapons that can also fling insta kill projectiles?
memories of splatfire lmao