This is a complete fabrication. Aadhaar verification via biometrics was permitted for all financial, telecom and other services simultaneously. I got fingerprinted for an Airtel SIM and a Kotak Bank account first and Jio much later.
it isn't fabrication, when fingerprint authentication was (may be still) the ONLY option provided by Jio. I went to buy Jio sim and decided to not buy only because there wasn't other option like submitting copy of document which all other telecom companies provide.