asked by
on 5/3/17They want access to the camera because you can take a photo of your item for sale directly through the app.
Access to your existing photos is in case you don't want to do that. (In case you aren't in the same location as the item when you list it, or the device you're posting from takes lousy photos, for example).
Hope this helps. As a photographer, I completely understand your concern; wouldn't want my personal information compromised either.
(I'm just a seller, not part of the company.)
It is best not to interact on the world wide web while under the influence.
Keep your feet on the ground, and keep reaching for the stars.