What amazes me here is that AC is succumbing to social media extortion. Unless AC offered extra insurance on the poles (and I don't think this is common any more for checked baggage) and the vaulter bought it, there would have been an explicit limitation of liability -- either in AC's CoC or pursuant to some international convention (e.g., Warsaw or Montreal). IME, this limitation of liability is to zero for certain items (e.g., cameras, computers, and maybe odd-sized sporting equipment) to ~US$1500 for regular baggage (e.g., clothes, toiletries, etc.) It is nowhere near $10,000. So it is only due to the vaulter's social network fame that she got so much more than you or I would have. See:
https://www.aircanada.com/ca/en/aco/...liability.html