Unuseable splash and lingering potions can be brewed

Based on MC-85842 the question arises why splash and lingering versions of potions with no use in splash or lingering form can be brewed and are obtainable in the creative inventory.

I could understand if you could get them by using commands, but there is apparently no reason why they are brewable and obtainable in the creative inventory.

For example a "Mundane Splash Potion".