I think the idea isn't about whether you would Want or Need freedom/control/ownership of your device; it's about the value of that freedom when an application depends on a closed upstream service versus if all the functionality is captured by the app running locally.

I personally think that its important to have that control and freedom for its own sake, but I understand the sentiment that "if my data is getting shipped off Anyways to some unfree system then why bother? I can't make the same guarantees around privacy and security as I can with a fully libre application"