People learn this at different rates and for wildly different reasons. When I was out of college working at Amazon, I would be amazed that my colleagues seemed to lack skills like doing the laundry.
But I got kicked out of my home at 18 and it was made abundantly clear from the age of 16 onward that this would be the case. Remaining a child is a luxury that I wish everyone can experience for as long as possible
we had to help with housework as soon as we were teens. laundry, shopping, cooking, dishes, cleaning the house. i didn't live alone until i was 27, but i had all the skills needed to take care of myself. staying at home was not laziness, but simply economical. i moved out when i got a job in a distant location.