I can assure you 99% of my data/files never see the cloud other than as encrypted containers for backup. That's good practice for most business is it not?
I know you're /s but it's not even about privacy, it's the cost of mitigation after $cloud_service_x has a data breach and we then have to assign resources to account for _our_ clients data etc.
this is a terrible argument. Would you enjoy going to the toilet when a certain group of people (like your neighbours) could watch you doing your "business"?
I can assure you that 99% of people and businesses do not operate that way, and that people you communicate with, buy from, and sell to, are all sending your data effectively unencrypted to the cloud.