There were people letting out apartments before AirBnb, and there were taxi cars before Uber - yet we feel that these companies are making our lives easier.
Also your question is very much centered around your own world view. What about the Venezuelans who are mining bitcoin becauause theyir own currency is at an all time high inflation rate? Isn't that example enough to at least partially answer your question about how blockchain addresses societal problems?
https://www.economist.com/the-economist-explains/2018/04/03/...