If we’re using the, “No official said so.” Argument then first of all they hinted at it when marvel cut all contracts with Netflix and canceled all the shows and second of all “No official said” that they were canon either
Exactly and Kevin Feige said that Disney+ is first time they have shows that intertwine with the MCU suggesting that Disney+ shows are currently the only ones that are canon
"Intertwine" meaning that they are part of the same story. The old shows can take place in the same universe, while telling parallel stories. I personally like the idea that not everything has to lead to the same point. It makes the world feel more alive.
As AoS has Sif and Fury, was involved with post movie events of Avengers, Dark World, and Winter Soldier, pre events of Age of Ultron, explained why Sif wasn’t around for Hela’s massacre…it is canon