I would think that a person who is incapable of using a mobile phone and mobile boarding pass would also be incapable of buying a ryanair ticket in the first place.
Mine was with Avis/Budget. Frequent buses and their depot was only 5 mins down the road. I did see people with other companies waiting longer for their bus and getting frustrated.
For me, some issues are easier dealt with in writing, especially when dealing with PNRs, flight numbers, dates, times. It can also be hard sometimes to understand accents and hear during bad voice connections.