Wow not true at all, everybody hesitates to bring forced to give mobile number at the supermarket it cloth stores for no good reason than to feed into FB/Google in bulk.

For paying a bill you're just scanning the QR most of the time, it's only P2P like cabs/autos when you may have to scan the drivers personal QR. Gpay & others apart from BHIM tend to already generate or allow alphanumeric UPI ID.