Part of the problem with "just get over it" is it bites both ways.
In many cases, covering a huge amount of land, no title or claim was ever ceded to the Crown.period.
So in fact a large amount of the population of Canada exists on land that legally, they have no title to.
Granted, the majority live inside of treaty territory, but with few exceptions those are not lands that are presently part of the land claim dialogue.
It has more to do with un/underdeveloped resources outside the treaty areas.