Of course, if that information is on your phone…. guess who else has it? Apple, Google, Amazon, or whomever you have your back-up account with.
How comfortable would you be with a complete stranger taking your unlocked phone behind closed doors for a few hours?
You are free to use the service, but you must agree to their terms and conditions. It would be nice if you could keep all of the rights to your data, but that just isn’t possible.