In general, I think that if people don't want to manage things in the way that works for the majority, they should bear the cost of being out of step. I don't think that people who simply 'don't want to' get on board with technology should push up the price for the rest of us when councils, retailers or whatever have to provide alternative ways of paying bills etc.
However, I think that there should be exceptions for people who are genuinely unable to access the internet, such as the very old, the disabled etc. This is particularly important when it comes to voting - it would be unconscionable if people were unable to vote because of lack of access to technology. I know that usually it is possible to vote in person, but the fact that many people might be uneasy about going out in a pandemic means that there has to be an alternative way of voting that is accessible to everyone.
So in answer to the OP's question, I do think it is unreasonable for individuals to expect to do everything to suit themselves, but I also think that there should be some exceptions, and that this is particularly important when it comes to fundamentals such as voting.