Because it's mostly business dispute resolution and it dominates the stats if you include it.
It's not like you can ask the courts to use state violence on the guy that shorted you come coke or to kick that other gang's dealer off your turf because he's already been warned once. Illegal industry has to DIY it.
To include it would be like compiling a list of extortion and including government fines and civil judgements. It dominates the stats so much that if you include it and evaluate it you're not actually looking at the thing you want to be looking at, you're measuring by proxy the size of something else. You'll wind up deriving conclusions like "most mass shooters are low level gang members" or "the threatening party in most extortion is the state" that is nominally true but also absurd doublespeak not actually congruent with the meaning of those words.
It's not like you can ask the courts to use state violence on the guy that shorted you come coke or to kick that other gang's dealer off your turf because he's already been warned once. Illegal industry has to DIY it.
To include it would be like compiling a list of extortion and including government fines and civil judgements. It dominates the stats so much that if you include it and evaluate it you're not actually looking at the thing you want to be looking at, you're measuring by proxy the size of something else. You'll wind up deriving conclusions like "most mass shooters are low level gang members" or "the threatening party in most extortion is the state" that is nominally true but also absurd doublespeak not actually congruent with the meaning of those words.