I've been noticing this more and more, there's an insistence that pointed economic or environmental criticisms of some consumption habit, usually almost exclusively partaken by the upper middle class and wealthier people, must actually secretly be a purely cultural critique. I'm sure these guys work for Exxon or some shit, lmao.
I mean, this is fundamentally an engineering problem of mass transportation. You can do it on cargo ships. You can do it on cruise ships. You can do it on war ships. However you want to do it, you need to be able to move large ocean-going vessels across wide bodies of water while producing limited amounts of waste.
We're not doing it anywhere, atm. That's a huge problem right now and an even bigger problem into the future. Worrying that someone might use efficiency technology for fun instead strict materialist value add is pointless if we're not doing it in either space.