Earlier quoted context omitted.
Yes but obtaining a digital certificate requires paperwork as well. And not to forget, renewing it every year (or two).
There's not too good a way to get around that, is there? You do need to establish your identity by some means initially. Perhaps they can let you renew at less frequent intervals (like they do with passports), but other than that, what do you propose?
When filing online, you can obtain a digital cert by supplying the serial number from last year's assessment.