I find the dish detergent hypothesis more compelling than I used to - before moving to Australia. Here, I've noticed that almost nobody rinses the dishes after washing them (something I have always done). Curious what others do in different locations/cultures. Seems pretty obvious that consuming surfactants, triclosan, phthalates, alkaline agents, synthetic fragrances and dyes is not a great gut health strategy.
Doesn't that make the next serving of food taste like soap?
Not food but we definitely grew up in Australia with drinks that tasted a little of detergent from a generation of families that never had a dishwasher.
Far less common now as dishwashers became cheaper and more ubiquitous.
Worthy noting not rinsing in Australia is almost certainly a regional | family habit.
Sixty plus years here and four generations of our family and most people we know rinse off plates and glasses and vigorously dry with a fresh towel.