Earlier quoted context omitted.
95% of Alberta is unceded First Nations land. It is not a valid country without it - without the consent of the relevant First Nations, a separated Alberta would be a few municipalities enveloped by... Canada. This is not a concern in Quebec, because the overwhelming majority of it is ceded land. If ducks had two wheels, they'd be bicycles, and if there was anything in common between the two provinces, you might have…
As far as I know, First Nations lands in Alberta are indeed ''ceded'' under Treaties 6, 7, and 8 with the Crown. British Columbia is a province with a huge proportion of unceded land, but not Alberta.
The treaties were made in perpetuity, and if you are going to not hold up the crown's end of the promises, the FN's side - giving the crown and Alberta governance over the land - needs to be reverted as well.
Contracts require both sides to adhere to them.