Once everybody is in trenches and HMG are deployed way above 1914 practice things change in the western front. But not on the eastern front. With Lewis and BAR issued to platoons rifle fire looses importance. But in the Russian Civil War rifles made more sense as an individual weapon.Rifles with well trained Soldiers using them.
Think the 1915 fresh out of training camp 'Pals' Battalions would have done as well in the Race to the Sea as the far better trained BEF did?
The BEF gets a lot of credit, but other forces also made good use of their rifles.
Osprey volume on German vs Russian infantry action in 1914 is very informative.