the terrifying thing will be when this type of system gets deployed at scale with drone swarms. The dream of any authoritarian government to use against citizens to keep them in line
(I am using the opportunity to reference the fact that the USA indeed has a “knife missile” and it is similar in principle if not in capability to the knife missile if the “Culture” series by Ian M. Banks.)
On the other more surgical strikes may promote use.
Guns only help if you've got the right person to start with.