Someday this will be possible, but all will take time and a long process. I think your goal is why people use fiat money more than bitcoin, fiat money is more tangible and not worth much in front of cryptocurrency, advanced technology countries will be able to make bitcoin like gold where the rich will hold it
Apart from the reasons you have discussed, people all over the world are not all well educated. They dont even understand how to use smart phone so for them this is of course not easy to deal in bitcoin. Moreover there are elderly people who would also have issues with advanced technologies but as far as the youth is concerned or those who are using smart phones and internet will definitely enjoy it.
yes it is a great barrier in the path of bitcoin that illiterate people would not understand the language of cryptocurrencies and also they will not easily feel comfortable with bitcoin, but these barrier could be finish if we start awareness about the crypto because still there are a lot of people that without any education they know much about technology, so the illiterate people can also be informed about the crypto.