Something like that, the difference is the velocity at impact. Dropped from an aircraft, there's a limit to how fast it hits you. The amount of kinetic energy the weapon has. A baseball lobbed at you vice one thrown by a pro pitcher. A concrete bomb is indeed a kinetic weapon, although ins this case, one meant to cause less damage than conventional bombs. You drop one on a house, your damage, minor some shrapnel effects, is pretty much confined to that house. Even the smallest explosive bomb in inventory (barring oddities like DAGR) is a 250lb bomb, which will take out maybe 3-4 houses.
Te kinetics we are talking about are not so much about that limiting of collateral, but about actually adding energy to the strike without the issues of a larger warhead, or fusing, or all the logisital headaches of explosives. Storage requirements (only so pounds can be stored within so many feet of so many other pounds, must have balst walls or earth sheltered magazines) hazmat concerns, shelf life, demilitarization costs, all that stuff goes away when you go kinetic. Your ammo is hunks of otherwise inert metal.
And I say that as a guy that has gotten to see rockets and Hellfires and 20mm guns fired from pretty close range.
