I disagree. "based off" means a completely different thing than "entirely": the former is not exhaustive, the latter is. "Luxury fashion" is a firmly delimited

I disagree. "based off" means a completely different thing than "entirely": the former is not exhaustive, the latter is. "Luxury fashion" is a firmly delimited subset of fashion. The reason OP omitted "luxury" was to set up their false dilemma, which wouldn't have worked between "luxury fashion" and standardized garments (wouldn't have worked in the sense it would've been even more obvious it was a fallacy).