What I would add to that is simply that there is currently no restriction on the capacity of the provinces to establish their own response capabilities of whatever sort. Provinces will exercise jurisdiction should they see the need to create their own autonomous capabilities, and the Government of Canada is quite distinct from that.
Whether or not that's advisable, and whether or not that's the most fiscally responsible route or the most effective in case of actual disasters, is precisely the conversation that would need to be based on evidence, study and informed opinion.