Why don't faceplates get cut on an angle?

[veggieburger]

Another "deep thought" while riding my bike.

As I lean down on my Zepp stem, I'm exerting a lot of pressure on the faceplate retaining screws. I assume the stem starts out as a solid piece of aluminum, then the excess gets machined away. Cut the faceplate, drill crew holes, you're more or less done. But way back in the day I had a Cinelli Alter that had a faceplate which came down on an angle - so the bars were cradled, and my weight came down more on the stem, less on the hardware. Doesn't that seem like a more sensible design?