It seems incorrect that iOS would be a higher value target for malware. Getting at valuable data would be much harder. Getting at backups would be harder. Encrypting the service for ransom would be harder. Disguising your apps illicit activities would be harder. And businesses are much less likely to store the payroll data (or whatever sensitive info) in their iOS device.
Only things I can think of would be iMessages, and location data, but your likely able to get iMessages of of someone's Mac...
Am I missing something here?