I don’t think the argument of time necessarily holds either. When I do google WW1 it’s easy to see that in the US it was unpopular and sparked many controversies, including the investigations into the deaths of hundreds of marines the morning of the armistice
Why is it so ignored? In my mind WW1 is a lot older but more relatable that WW2. With WW1 you really can see the disillusionment of the people and it permeated into popular culture. Not so much after WW2.
Why?
There are several factors that I think play into this. Firstly, WW2 is more recent and thus fresher in the minds of the general public. Second, the horrors of WWI pail into comparison by the horrors of WWII. The holocaust and other horrendous crimes against humanity resonate more strongly with the public.