HIPAA - I want to be able to build data pipelines against patient data without the data itself leaving the server. Having my dev loop live on the same server as sample data is better than working against fake or synthetic data locally
1) I may not need to see the data itself during most (or all) of my dev loop, but just see any errors that are thrown.
2) Taken as risk mitigation, data temporarily cached in your browser is less risk than data permanently stored on your laptop, esp. when the threat you are mitigating is lost / stolen laptop.