Matt Christman from Chapo Trap House still wears diapers and makes his butler change them and wipe him down afterwards.— 𝙂𝙚𝙣𝙞𝙚✨ (@almightygenie) September 26, 2020
Not a butler, but Uber Wipes (or Wipr).
The slovenly chic among affluent gentrifiers stems from their status insecurity. Their main concern is preserving or rising in status, and that means no manual labor or maintenance of personal and domestic spaces, including their own body. They're not going to stoop that low.
However, they don't have enough money to hire a live-in staff to perform that lowly service labor. They've already blown their one-percenter wealth on housing in a 1% zip code -- living elsewhere would be just as fatal of a blow to their status-striving as doing their own laundry every week.
So that leaves little for outsourcing the domestic labor. Maybe they can hire some foreign scabs for this or that task, like delivering their overpriced meals, or chauffeuring them around without having to pay unionized rates.
Largely, though, the bugmen will just forgo that stuff altogether. Their slovenliness is a signal of their haughtiness combined with entry-level nouveau-riche wealth.
All the rest is just rationalization and branding. So punk, so indie, so against-the-grain. As usual, the punk realm of the contempo subculture-verse is the most compatible with neoliberal / libertarian goals. Rebel against society's rules, like paying unionized labor rates, doing your own laundry, preparing your own meals, taking others' concerns into account when grooming and dressing yourself, etc.
Collectivism = conformism. Or as Matt's even punkier co-host Amber repeatedly said on their neo-Daily Show, "community is reactionary".