> Just copy and paste files
If all your workflows allow copying as binary files, more power to you! But there are a lot of workflows where that is not possible. This was inspired by years of hands-on operational incident handling in production systems. Every time we use a binary format, it's extra painful.
This particular format would be slightly more compact as binary, but not enough to justify closing the door on all the use cases that would preclude.
I'll probably add a binary variant for people who prefer that (or for people who want to be able to embed binary values in the data without base64 encoding it)