Wait people are in doubt if the raids are canon?
It's because of Alex raids and Omega raids and Crystal tower raids that we even have Shadowbringers as an expansion. The "Tales from..." series confirms that along with Twinning dungeon and the Exarch himself.
Next they'll clain Eden isn't canon despite it being mentioned in the MSQ that Thancred and Ryne are busy with their ventures into the Empty studying Eden.
I guess for a lo of people who don't read the Encyclopedia or side content like the Tales series they won' know all the lore bombs they miss out of but factual it is since it's written by XIVs lore people to fill the world and cover events/info we might miss in game.

As far as the Weapons go, colour me Hyped