Good Point.
I agree with you about the importance of being aware of your surroundings from minute to minute. Especially during a bug out situation, but it is hard.
When the trail is at all rugged.... Rocks, Roots, dips, inclines, etc I find it hard to keep my eyes up. Adding a heavy pack magnifies the problem.
I often use two hiking poles on rough terrain. It gives a little more confidence to keep your eyes up. In that if you do stumble over something the poles can be jammed into the ground to catch yourself.
Thanks;
Jon