Maybe I'm old, or maybe because of where I was during my time, but if a soldier is having a hard time carrying a drone that weighs less than 10kgs, there is a problem with fitness in the army. Although, I'll admit no idea how much the case itself weighs, so let's call it 15, but my point is, a soldier should be able to carry that as long as necessary, along with their usual load, since they won't give it to the machine gunner or marksman or poor sob who is carrying the rocket or grenade launcher.
And again, you're comparing apples to oranges mate, or rather, comparing Kargu to what it isn't. Grenades have a certain radius that'll kill everyone outright simply because of the blast pressure, outside of that, it's up to the shrapnel to finish to job, or not. A simple 40 mm exploding on the ground next to the target will kill anyone within, damn I can't remember the exact numbers, let's say 5 or 10 meters. Kargu will most likely not have that, or, that radius will be smaller and as you said probably directional, since it has a proximity fuse/sensor.
A modified rpg round, or a mortar round, or a grenade dropped on top of someone or something could have a greater impact I don't disagree with that. I also agree with you that a cheaper alternative to use against terrorists makes a lot of sense, like the one you described. But I still don't believe it is as useless or terrible as you seem to believe, we disagree on that.
Btw, the configuration you showed is actually an RF seeker as far as I know, not an rpg or anything else and I don't know if it has passed beyond testing phase yet, or any of the other warheads.
I wonder if any of our companies are working on a coaxial two rotor drone that can drop a grenade or mortar round, they are much more agile than these.
