No, I did not misconstrue any of what you posted. I am well aware of filament orientation of Halogen bulbs and the various styles of placing LED emitters onto the post in an LED bulb.
Some LED designs utilize a wide array emitter, while others use a less wide array emitter. Based on the emitters potential, they often configuire the LED bulb design to be two faceted or three faceted.
Based simply on your mention that LED bulbs are not universal, and specific to the housing, reflector, and lens, then the same will be true for a replacement halogen bulb, which then, I suppose needs to be purchased from Can Am to ensure the specific bulb is installed.
When you consider the design of a non projector headlight assembly, whether on a truck, car or Spyder. All are designed to project light forward and laterally horizontal. There is no purpose to design the light housing assembly to project forward and upward. I back this up by offering that people look at the curvature of the reflector, vehicles with non projector lights are this way.
Saying that, the bulb designers understand this and design bulbs in this configuration. The variable in design is the optimized focal point the light projects onto the reflector.
The most basic way to have seen this would be those of us that have used Mag Lite flashlights. As you rotate the end, the bulb is repositioned relative to the reflector. This give a range of true light output from worthless to functional. And when you looked close at the light output from the Mag Lite, many areas not illuminated from the poor output could be seen as dark areas.
If the LED uses low quality improper angle emitters, portions of the LED output may not fill the reflector, creating poor light output.
The lower quality LEDs and those with less Lumens do not fill the reflector fully or intensly to have good output. This is a quality problem based on cost. The LED remains universal, but like any low quality product, performance is poor.
I stand by my saying I toss the BS flag on your post. The LEDs replacements are universal, some are low quality and none are specifically designed for specific one application housing unless a special oem design.