Flexibility. The ability to prioritize. like what if you realize you have no clean towels, but your washing machine is full of other clothes?
DisasterTransport
You're right that it would be ideal to simply wash the dishes before they accumulate, but I often find myself in situations where I don't want to do dishes before and after I cook. Moving the tub takes 5 seconds, washing the accumulated dishes might take 5 minutes, and if all you wanna do is rinse some berries and make oatmeal before you run out the door taking 5 minutes to do dishes might not be on the table.
Ultimately the dish tub and keeping the sink clear is a strategy I learned to avoid domestic blockers. Regardless of what everyone else in the house is doing, I need to be able to use the sink without doing a bunch of extraneous labor first. And getting mad at them for being lazy or messy or whatever might feel good but it doesn't solve my problem. There are edge benefits like the fact that I never find accidental mold in my sink, which is nice from a hygiene perspective, but mostly it's that I want to be able to use the damn sink when I want to use the damn sink.
I would not. I separate staging from process.
It might be normal, that doesn't mean it's correct. I mean, your house, your rules, but imo the sink is a workspace and not a storage space. Same reason I put my clothes in the hamper instead of directly into the washing machine.
Any sink filled with dishes will accumulate water. I don't understand what's hard to imagine about dishes being haphazardly stacked in such a way that it makes it difficult to see what is underneath.
A dish tub is a tub in which you put your dishes. It's like a bus tub but smaller. It's useful because it stores dishes outside of the sink, and you can also use it to presoak. They're honestly pretty killer if your apartment doesn't come with a double sink. Someday I will have a triple sink, but for now I use the landlord special and a plastic tub.
Common was a bad choice of wording. 'Not uncommon' probably would have been a better way to put it. It's more prevalent in certain cultures, often brought by immigrants from less economically developed regions. There are historical reasons for this, and we could get into the sociology of it, but the point is that where these people's parents or grandparents came from, rinsing meat made practical sense. Industrial agriculture and cold chain logistics remove any benefit to washing meat, but culture doesn't turn on a dime.
Important to note that "washing" chicken sometimes involves a brine and citrus soak, which is closer to marinating if you ask me but they call it washing the chicken. Washing under the faucet is just a bad idea but people do it and they mostly don't die. Another argument for breaking down socioeconomic barriers, I suppose.
"I don't need a seatbelt because I don't crash my car" ass argument
I also don't put knives in the sink. You know who does sometimes? Roommates, girlfriends, children, and guests. Keeping the sink clear ensures that you have visibility into what goes in. I'll use the sink as a temporary swap space when I'm cooking or w/e but after that everything goes in the dishwasher or the dish tub.
You might someday find yourself bleeding over the sink and blaming someone else for being an idiot. I will not.
Washing chicken is unfortunately fairly common in the United States. People think it reduces salmonella risk. They're the opposite of correct, but that's why they do it.
"Just don't be an idiot" is a great rule until someone decides to be an idiot. Accidents do happen, so structuring your habits and procedures to minimize risk is worth it.
If you didn't want Emily you should have ordered it Bonesless

And then, when they observe that there's a lot of congestion (on account of all the people who insist on driving into the city from the suburbs), they complain that there are too many people. The circularity is beautiful.