Your task is not to prove that drugs exist in the homeless community. For your point of them “fucking their lives up with drugs” to be true, you have to prove that their personal drug use was the catalyst for their living conditions. Do that or take the L.
And to check yourself, you might want to look up the prevalence of drug use in more affluent communities. Hint: it’s a lot.
Communist Filth/Capitalist Filth (lemmy.ml)