If this is the case your dishwasher sucks. Other than knocking big chunks (bones, cobs, etc...) into the trash there's no need to pre-rinse dishes on a competent machine.
I do agree that dishwashers don't save as much time as you would hope, but they do help. Handwashing and drying is slow.
The laundry machine is absolutely faster than beating your clothes against the washboard, but yes, it doesn't check for stains and it is still a big time sink.
Roombas suck. No argument there. Vacuuming a room is actually pretty quick, it's picking up all of the stuff first that takes forever when you have kids.
It seems to me that western people have become too entrenched in their familiar lifestyle and it is too hard for current technology to adapt to it as is. And so we live in a status quo where a tiny rich minority can afford to hire human servants to do their chores while middle class can neither hire human servants nor buy robotic ones.
Your experience is much different from mine. I bought a Roomba, then bought another Roomba, because I realized I needed Roomba redundancy.
Could not imagine life without Roomba!
I don't have carpet and no rugs. On hard surfaces I find Roomba does a better job then manually sweeping. But maybe different with carpet.
Doing laundry is a lot more than loading and unloading. If you have small children then you have to check everywhere for stains and apply something like Spray 'n Wash first. And then folding takes a lot of time. (There is a folding machine launching soon but it's expensive and might not be reliable https://www.foldimate.com/ .)
I've tried a couple of different Roombas. They simply don't work very well. The rollers get tangled on rug fringes. They get stuck under furniture. The suction is weak. They require frequent cleaning. In the end it's less hassle just to use a regular vacuum.