How the **** is this really a hard concept for you guys to grasp? Urashiki was a concept for the movie that was ditched. The manga is the only canonical piece, and Urashiki doesn’t exist there.
How hard is it for you to grasp that canon and filler don't matter? It's all just literature for entertainment. This isn't real life history we're talking about, so we don't have to worry about which account (anime or manga) is the "real" or "true" account like we would in a real life situation (like in a court case).
Boruto (series) is better off being treated like DBS (having the manga and anime be considered separate continuities), because there are way too many divergences between the two for one of them to be dismissed as filler. Boruto anime is simply its own canon while the manga is its own canon.
This concept doesn't just apply to Boruto.
Every monthly manga that I have read has had its anime take serious divergences (and vice versa).
Filler and canon just don't work for monthly mangas with weekly anime counterparts.