Good point. I ran into something similar on my iZIP Moda E3 with large brose display. When I went to a high rise stem with the stock bars, the display stuck out in the open and seemed vulnerable to getting damaged. The cable to the display were also not long enough and would have likely been damaged/broken in a crash so using a stem rise wouldnt have worked either. I was able to cure it with a higher rise 50mm handlebar.
Higher rise handlebars might also work for the case you mention, especially if you need less than what as stem rise forces you into. This also adds possibilities of different sweeps (both up and back) which isnt an option with a riser alone (or stem).
FWIW, While I mentioned reversing the stem, I was only done as reference as to something I did on a bike to 'reduce' the height which is the 'opposite' of what we are discussing here so I see no reason for you to edit your original post unless you want more ammo to support your position as the stem riser being the best solution by mentioning a case which wouldnt apply to anyone who wants to actually 'raise' their handlebars.
In addition, there can be a downside to higher rise handlebars as they usually have less clamp space next to the stem for accessories like lights (which might end up being canted due the change in handlebar diameter). This happened on my Moda mentioned above (the brose display took up enough handlebar space to make the lights canted and I had to add a handlebar extender.
Handlebar Extender
Here is a pic on my bike, I hate this solution and need to find some 50mm bars with more 31.8mm clamp space.
View attachment 68718