I haven't looked into those camera claims, so can't really speak to them. I carry insurance for my computing devices (super-cheap on the homeowner's policy, btw), so any repairs are getting done correctly, or the device gets recycled and replaced.
The very
last thing I want is to be forced to use some sh***y app from an untrusted source with access to information that I don't want gathered or sold.
Here's some relevant information about Apple Pay:
Apple Pay transactions use the Secure Element and NFC controller to keep users’ purchases and data protected.
support.apple.com