I’ve seen strength mentioned a few times, but no one considering if the mount will brake off in a crash or colliding with a branch.
Most helmet mounted lights can come off easily, my ayups for example are held with a rubber band that locates over a nub at the rear so the light can come off fairly easily. A nylon bolt would presumably offer a similar breakable point.
Just let me say, 3D printed parts are plenty strong enough if printed properly and used as designed. Like anything really.
I use a screw with a wasted portion, that snaps before the threads in the aluminium light housing are damaged. Other than the oring attached lights and the old L&M, I dont think any others have strain relief in their mounts. Easy enough to print a part of the mount that would break should you want it, but then the mount will be forever useless. I think he screw with the wasted portion is the way to go. I can supply the correct size screw / bolt too.