2. Why write at all: consensus drives policy change, and information drives consensus. Writing, of any length, assembles information, bundles it into an argument, and (if the argument lands) becomes a 'capsule' around which consensus can form.

1. Why long form: room for nuance and research. Long form can include different perspectives (including stripe's -- perhaps they have a reason for these practices). It can address questions like 'what % of the industry behaves this way, what are the downsides to the banks' approach'. The interview + editing process can tease out anecdotes that sharpen the argument, or uncover new aspects of the problem.

This part is selfish, but for the writer, long form lets you improve your own knowledge of the topic, and your ability to make arguments around it.