How? It would literally just respond with a massive JSON dump, which wouldn't be very human-readable.
If we did that then anyone would be able to see the IP addresses of all banned players which opens the door for doxing and the like. We used to have LBRs public in the past but had to make it private because people complained that their IP address was being posted to the world wide web whenever a request was filed for them. The spreadsheet acts as a compromise between transparency and privacy.