It's still far cheaper, faster, and less wasteful to wash by hand. It's just that the technique required to achieve that is... controversial? It's definitely always so misrepresented you'd swear it's the "before" part of a 90s informercial shot in black and white with a frustrated idiot failing at a simple task before throwing their hands up and pleading that "there has to be a better way".

Dishwashers simply aren't used in places with water restrictions. Broke people don't have a budget for dishwashing detergent because it's less general purpose than dish soap. There are likely people who started using their dishwasher more or even suddenly bought one based on those rants. It jiggled the handle on consumer trends that otherwise rarely change, so I consider that "influence".

If he stuck to just explaining how they work instead of attacking people's way of living, it would have flown under the radar.