That's true, if the camera developed a fault (short circuit) then the full 10A of your 10A supply will go into the camera until it either burnt out or the power supply gave up.
I would like to think that these manufacturers would have a fuse or some type of overload protection incorporated into their products.
You could install a 2.5A fuse in the camera 12V positive lead for insurance (maybe I should do it as well).
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