Do you think henchmen/mooks who recognize the WoL but attack anyway are silly?

[Jandor]

Also explain to me how you have friends against Thordan in Azys Lla? You shouldn't take the journal seriously when said journal makes a joke about you bringing friends into the Azim Steppe dungeon when suppose to be a trial for yourself. What a great WoL you are to not follow their traditions

So journal entries are entirely non-canon because of Bardam's Mettle? Some of the entries are a bit silly so none of them count at all is quite the leap.

They can't put it in cut scenes because the story isn't told or designed with the idea that you have others with you. Hades they SHOW in the cut scene where the others came from which is why no one questions that and it's the same across all the languages.

They can't put other people in your cut scenes because of the linear nature of the flow of time.
Adventurer friends is the story term for duty finder randos, they can't put said randos in your cut scenes when the events that decide who they are haven't actually happened yet.

The gameplay/story segregation isn't that all content is actually done solo, it's that your party can't appear with you outside of said content. It'd suck if they forced people to find 3 to 7 others to follow them around while they did the fetch quests leading up to the real fights, so instead they just make do with implying that they're somewhere nearby, just off-camera.

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To be pedantic, the Hades cut scene doesn't actually show anyone else. It's very heavily implied that adventurers will pop out of those beams of light, but it isn't actually shown until the little cut scene inside the instance, and cut scenes inside group instances presumably don't count for whatever reason, because those always show other adventurers.

Also I have seen people question that cut scene and say it doesn't count. The ease with which he summons your back-up doesn't mesh especially well with the struggle he had to get you across in the first place, and the difficulty he is having in sending everyone back.