A serious discussion on the matter should consider all threats to violent populations.
How many poor people are killed by police and by criminals? how muc money is required to re-train police to be moe humane? how many criminals you could arrest with the same amount of money? how many less criminals if you would get if you give vouchers to parents in those neighbnorhhod?
Fortunately, this country have a perfect system to conduct controlled experiments – different states have different policies. Check how things compare in different states and how they change when policies change.