What tune? I'm just giving a theory of why things have evolved the way they have.
This is a self-referential definition.
The removal of vibrant individuals from such communities is design to crippled them, making them more reliant on, e.g. unfavorable employment.
Which, naturally, can cripple families for incredibly small amounts of possession.
[1] https://www.splcenter.org/20180918/racial-profiling-louisian...
This statistic does not accommodate for cultural differences in use. It's quite possible that black people are more likely to carry and/or use marijuana in public or while driving.
It's easy these days to get arrested for minor deviltries (way easier than when I was a lad) so the police have that in their pocket.
So, you pick out the groups who are statistically most likely to commit real crimes, pick them up for any old thing, and warehouse them until they are more old and tired.
Like I said, it's not fair, but it appears to work to some extent.
The point is that criminalization of poverty drains vitality from already-marginalized communities.