Thanks for the input!
I realize I didn't clarify explicitly. While I'd agree that a one-time $15 gamble would be an irrationally exorbitant expense if it was in place of a family meal, I think we're talking about different things.
Even if "poor people" were <$1000 away from financial ruin, $15 towards a reusable entertainment asset is quite different than $15 towards one-off lottery tickets.