How often do you have to run more than one wash load in a day?
Most people let laundry build up until they need to run a full load of a given type. They do this because wasting electrons is apparently only slightly less of a sin than wasting water, since we don't really do any useful large scale desalination.
Practically speaking, this is easy to do with 3-4 people in a house, particularly if one or more of them is a child.
In any case, this build up over time is how we get the event called "laundry day", as opposed to doing laundry daily.
Most of the time, one wash per night would serve. The occasional times you need to run more than one wash in a day, just run one during daytime.
I think you are perhaps single and male, with not a lot of clothing so that you can build up a laundry backlog without wasting water instead of electricity, and so instead, you waste both by doing daily laundry, and you put everything in together, without separating it by type, fragility, and temperature/cleaner requirements.
That's cool and all, but realize you aren't very representative of the majority of people who need to do laundry.