The alliance exists to attack, not defend.
That's why of the 4 wars it has taken part in in the last 30 years, 4 have been wars of aggression while 0 have been defensive (article 5 was invoked for 9/11 but occupying afghanistan wasnt a defensive move it was an imperial move).
It's a dog eat dog world out there for sure but sometimes the 14 year old boy isnt safer joining the crips for protection from the bloods. Sometimes he's just sacrificed as a pawn in a wider turf war as the crips' promises of protection ring hollow.