We reduce the amount of data to benefit from easier handling and less risk of exposure. Where this is not possible or not desired, we reduce access for unauthorised parties.
To note, this is in contrast to a general increase in data promiscuity in open data, on federated platforms and in the creative commons in general.
Also see:
Minimal computing appears to prompt these fundamental questions about choice and necessity: “What do we need?” (see Gil) “What don’t we need?” “What do we want?” “What don’t we want?” via 
A philosophy of technology use in which you focus your online time on a small number of carefully selected and optimized activities that strongly support things you value, and then happily miss out on everything else. via