We do to some extent. Law enforcement/Military has used both sound and light as non-lethal alternatives to bullets.
As to the concept of a packet of energy as a projectile to be used non-lethally on humans?
There’s a physical aspect of this that must be considered.
Our skin is naturally very much a resistor of electrical charge, unless it’s wet.
So how do you get an electrical charge past the skin, into the nervous system where it can elicit non-damaging results (in theory)?
In tazers, they use metal tips that puncture the skin in order to apply voltage.
How would it be done with nothing but energy?
Otherwise, you just have a very precise flame thrower.
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