On the MUP, yes, headlight glare can be an issue when oncoming lights are aimed too high. The path is too narrow to move laterally.
Riding behind somebody with a strong taillight (eg: group ride) gets rough too.

But most of my routes 200 lumens is woefully inadequate.
I run a magicshine ("800 lumens") on the handlebar and a cygolite (I think 350 lumens) on my helmet.
Even with all that, I frequently outrun my lighting on some steep descents going ~35mph on cracked pavement with some sand/gravel. Many of the roads have no streetlights and have little ambient light.
And there are still drivers that don't seem to see me at intersections while I'm panning my helmet light across their car mirrors/driver's face.

If I see that the magicshine is aimed too high, it's easily re-pointed on the roll. I also will use a hand to shield it if it's pointed into another cyclist's face.