I can control the angle, but permanently aiming it down so far that it can't get in anyone's eyes is completely impractical. You would only see what's directly in front of you and you would miss a lot of stuff.

Not sure about your particular model but most front lights are designed to make the path visible in front of you, and not above.

It's the same with car lights: in order to illuminate the path at a reasonable distance, things above will also be illuminated.