Doesn't bouncing off the wall just effectively make the "backlight" dimmer? The light reflected off the wall is hitting your face versus the light from the screen hitting your face. It's still light regardless.
If you're using a monitor in the dark the way you use a projector, you should turn the backlight down. If you're using it in a well lit room, the brighter backlight should have less of an effect.
In principle, it's the same as staring at the moon Vs staring at the sun.
The fact that it's bright outside when the sun is up might help, but it's nowhere near enough to compensate!
> The light reflected off the wall is hitting your face versus the light from the screen hitting your face. It's still light regardless.
It sounds to me you've never actually looked at a monitor display large swaths of white before, it's brighter than light hitting a wall for sure, even with the brightness down, extra so when the ambient lightning is dark too.