Hence with 1.7 billion people staying unbanked, added to the increase of people who don't rely on banks, Bitcoin provides them with numerous options why they should use bitcoin for different purposes like sending money to relatives in different countries at a very low fee.
I don't think it's that simple in terms of giving all these people the opportunity to complete financial transactions. People in remote rural areas are often illiterate and do not have access to the Internet. It means that they do not have a bank account, this is normal and understandable to some extent, but do not expect that they will have sufficient capabilities to use the Internet.
Also, the most important point is that enabling them to use the Internet means that it will end their financial isolation, because in any case they are forced to deal with local financial institutions (which are not available in their regions) to benefit from cash because their countries often do not support Bitcoin payments.