I've always been surprised by how many otherwise vegetarian soups call for chicken stock as a base ingredient. Although I'm not vegetarian, I do like eating vegetarian sometimes, so I've been tempted to simply substitute veggie stock. But then it occurred to me, the flavor profiles of chicken vs. veggie stock are really different, so the chicken choice is likely intentional. Does substituting ruin the recipe? Do you ever consider them interchangeable?
You deserve a cookie.