Cluster munitions are bad, but you have to consider that people often try to hide in houses, in cellars during air raids in the city. Cluster munition will not do much to those people, other than being insanely noisy and terrifying. What will kill those people is a bomb that will drop the house on them.
Indiscriminate killing is a function of decision making process, not the munition itself.
Cluster munitions such as BL755 ( extensively used in Yemen at present ) were designed in the 1970s to attack massed Warpac tank formations pouring across the German plains.
As a consequence they usually contain a high proportion of shaped-charge bomblets which can quite easily penetrate several inches of concrete. Brick and roof tiles don't stand a chance. Even the shrapnel from the fragmenting jacket can penetrate steel plate.
The munition can't be removed from the chain, it's not a benign entity. From concept through design and production through to sale and use, the munition itself is a necessary element in the machinery of killing.
Downplaying the importance of the munition itself enables industrialised slaughter. The arms trade deals in munitions, and is a multi-billion dollar industry.
We can prevaricate all day about words like "defense", about how "guns don't kill people, people kill people", and about suggestions that "insanely terrifying" experiences "will not do much" to people. But language is important here, and you should consider carefully what you think and communicate about the weapons industry.
