I think part of it can also be (at least for me) upbringing. We always handwashed our dishes, and only used the dishwasher a couple times per year for big events.
Firstly, you can't wash with cold water because soap doesn't activate with cold water, hot water also kills bacteria and helps cut through grease.
Fats themselves are hydrophobic and without activated soap you wont get them off... enjoy your "filmy" dishes.
Second, humans expend a lot more energy than you think. The act of standing and using our arms releases varying amounts depending on physical fitness but averages somewhere in the 1kg/h ballpark. https://www.jstage.jst.go.jp/article/jjphysiol/50/2/50_2_199...
Dishwashers use about 1800 Watts and are commonly run for 30 minutes, the average co2 in the USA is 0.92lbs per kWh.
Meaning it's _basically_ the same.
Then there's the freshwater usage, which is the real kicker, because dishwashers use significantly less freshwater, and freshwater filtering is the largest environmental impact of washing dishes (not the direct co2 output).
Bunch of pseudoscience. I've never noticed any difference between washing with cold or not.
hot water also kills bacteria
Ultimately doesn't matter because they're all being washed away by the soap molecules anyway.
The act of standing and using our arms releases...
Lol, are you seriously trying to reason that what little energy you burn is more than a dishwasher?
Soap not activating when cold is not "pseudoscience", it's just a fact. Like grease doesn't become liquid unless heated. It's a similar principle.
> Ultimately doesn't matter because they're all being washed away by the soap molecules anyway.
If they bind, but, I'll give you this one.
> Lol, are you seriously trying to reason that what little energy you burn is more than a dishwasher?
Humans are pretty shitty at expending energy. This is one of the largest arguments against cycling long distances (though those arguments I don't agree with, but we're talking about total Co2 output here).
That may be true for most laundry detergents, which have to pull grime out of fabrics, but not simple dish soap. Just look at how well Dawn works to take oil off concrete, for example. Nobody's heating that up.
Once you’ve removed the bones and massive solids, the modern dishwasher can do an astounding job on the rest. Put a little detergent in the prewash (or on a Bosch, just in the tub) and let the machine do the work. (I also grew up washing dishes before putting them in the dishwasher. It’s almost never needed now, but old habits die hard.)
(essentially, the instructions are to remove the same things from the dishes you would remove if hand washing them in a sink with no disposal...)
I thought the same, and then it turns out that my garbage disposal was broken and obstructing the speedy removal of waste water from my washing machine. Fixed that and now my dishes come out clean.