Make a pretty good product. Price it to undersell the really good products. Make it vastly easier to buy a new one than fix an old one.
Truing a Shimano wheel requires two tools at once. The spoke nipples are placed so that you cannot keep the affected area of the rim in the calipers of the truing stand as you make the adjustment. You have to find the error, rotate the wheel to allow wrench access (one for the nipple, the other the immobilize the straight-pull, bladed spoke), adjust the spoke, then rotate the rim back down to the calipers. Repeat as necessary while the acids of cynicism thicken in your circulatory system.
On at least a couple of their shifters you have to open the housing to replace a cable. Maybe they felt people missed the ridiculous process of changing a cable in classic Gripshift, so they tried to recapture a fraction of it.
If Shimano made inner tubes they would have invented their own valve and they would change it every year. So things could be worse.
Shimano isn't the only one designing stupid wheels. They just didn't go out of their way not to. Personally I can't wait for straight-pull spokes to go away. They were just one piece of bullshit to bubble up during the mountain bike boom along with threadless headsets
Oh well. Back to work.