Yes!
And it's not just money. Imagine trying to use a smartphone if you had Parkinson's, or age-related macular degeneration, or mild cognitive impairment. Imagine using one if you lived with an abusive partner who demanded your Pin and punished anything he saw and didn't like. Imagine needing to get rid of your smartphone to help beat your online gambling addiction, and then finding you were locked out of modern society.
We think too easily of new and shiny things, and we forget the people who don't fit the mould, who get left to fend for themselves.
I know elderly people who are not phone savvy who should definitely not have smart phones, especially not attached to anything like banking. I have elderly family members who would be excluded from eating at a lot of restaurants these days because the only way to pay and order is by scanning a QR code. On principle, I walk out of these places and tell them why.
Anytime participating in the basic functions of life and society requires a smart phone, it creates an exclusionary system. (Note I said exclusionary and not discriminatory because the last time I said "discriminate" some pedant who probably works for a surveillance company took umbrage.)
@CppGuy @sunflowerinrain @anon_opin a lot of people with Parkinson's can use smartphones better than you.
Some can't, so the general objection to smartphone-required services still holds, but let's not make ableist generalisations about it.