I don’t find it frustrating, we are all different, I have a 100 yr old cousin doing online Spanish classes I have an 80 year old friend who will not touch any form of technology.
My Nan, died in the eighties, she had never used a landline phone just wouldn’t, never had a fridge, washing machine or any other electrical gadget as she believed that in a thunder storm she would be struck by lightening and nothing on earth would make her believe otherwise. She was an intelligent lady who had run her own boarding house ( taking all bookings by mail etc washing by hand, cooking everything from scratch) I accepted this was how she was and talking to her about giving things a try were completely out of the question She was a lovely kind lady who looked after me well as a child as mum and dad both worked full time.
She was petrified of thunder storms ( no therapy in those days) I can remember sitting in the cupboard, or toilet with no light on , ( electricity) comforting her as a young child It didn’t rub off and I love watching a thunder storm