i really dont think your theory about the reasoning behind baggy clothes holds any water. so they dont grow out of them? i mean, yeah, some gangbangers are young, but i would say most are at least high school level where they arent really worried about growing out of their shit. the gangster/baggyclothes thing came from prison. penitentiary inmates were only issued two sets of uniform, so as you can imagine, people's shit got stolen a lot. so they started getting one normal fitting uniform, and one really baggy one, so they could comfortably wear them both at once. plus, its easier to conceal a weapon. so when they got out, everyone wanted to look like the OGs with baggy clothes and no shoestrings and shit.
you learn something new every day.