At least there were tiers of canon in old Star Wars. If there were ever inconsistencies in the lore, there was an easy way to determine which version of events was lore accurate and which was just a goof or a reimagining of events.

Disney doesn’t seem to think there needs to be nuance like that in the stories. Axing the old canon was necessary for their new “everything with our stamp is canon” approach to work, but they haven’t exactly been the most diligent stewards of the lore since then.