[Vendor Name Here] will not disclose Your personal information, including the contents of Your Account, to third parties unless disclosure is necessary to comply with the law.I'm not planning to engage in illegal activities, but it's not like I trust Big Brother, either.
Second, a more troubling story appeared today in Computerworld (read it here). They report a "Russian forensic firm's tool" can access iCloud backups. To my mind, this "data exhaust" presents the very real possibility that foreign governments and/or crooks have targeted all the cloud backup firms with BPTs (that's Brilliant Persistent Threats) designed to let them troll all privately stored files. The same reason several governments will not buy computer equipment from China-based companies like Huawei and Lenovo ought to be reason enough for those same governments to forbid their employees to use cloud backup services: competition, foreign governments, or mere thieves will find a way to monetize your data assets. Guaranteed.
And speaking about guarantees, I have yet to see any cloud backup services advertise significant insurance for losses you might incur due to your files being grabbed by The Bad Guys. Quite to the contrary, their terms of service agreement has you pretty thoroughly indemnifying them from any responsibility for protecting your data.
Paranoia vs. stupidity. Hey, disk storage devices and fire safes are dirt cheap. Buy your own backup.