"Simple, long lasting, reliable... why not? "
because an electronic control, properly engineered and not built to lowest possible price, will be more reliable than a mechanical timer and gives the ability to drive a direct drive, infinitely variable speed motor like LG washers that needs no belt or pulleys. The technology is very cheap to manufacture. (the fact that machines using that technology are often expensive reflects greedy corporate culture not manufacturing cost.) It would be able to spin out water when needed. You don't only need to spin to extract water before drying, you also need it to squeeze out sudsy water between rinses. Older front loaders used to rinse without intermediate spins, and had to do 5 or 6 rinses to do a reasonable job with only 1 intermediate spin. Modern machines that spin before every rinse can do 2 or 3 rinses yet rinse better than the old water hogs.
If you want to build a one-off water and energy waster for your own amusement, knock yourself out. But don't try to go to market with it - it would be a fast track to bankruptcy.