That giant sling somehow looks more suited to deliver small packages directly into a backyard than Amazon's attempts at drone delivery. The military have proba

That giant sling somehow looks more suited to deliver small packages directly into a backyard than Amazon's attempts at drone delivery. The military have probably already tried something like that to send ballistic missiles I guess, and in that case you don't even have to accurately aim as the missile can guide itself to the target. Why isn't this a thing already?