Most reputable cloud services, whether provided by Apple, Google, Microsoft, etc., are more secure than you give them credit for being. Privacy can vary depending on the ToS agreement. Paid cloud services are typically going offer more privacy assurances than free services. Office 365 for Business is FERPA and HIPAA compliant file storage that can capture sensitive data types and block them from being sent via email or uploaded to unapproved cloud locations.
Everything you send, backup or share via Apple, Google, Microsoft is going directly into the hands of the NSA, CIA, FBI and whatever lower level law enforcement partners they choose to share it with. I imagine that certain criminal groups have access through key contacts as well.
If you think you are not a candidate for blackmail and will not be one in the future – it could be as simple in the future as the agent has a cousin who wants your car dealership footprint in Florida, we're not there yet, right now it's politicians, C-level executives, top level bureaucrats who have much to fear, small and medium sized business are still waiting their turn – go ahead and trust the American cloud.
