Human history is always riddled with insatiable greed and selfishness resulting into conflicts and problems which ordinary people like you and me can experience. This was true before and sadly this is even truer these days. Good thing that this weakness of human nature is partly addressed by the blockchain technology but then again just like any man-made invention nothing is really perfect here. We have the capacity to make things complicated and hopefully blockchain can sort things out. In my own opinion, the blockchain technology can be a big leap for humanity but still this is not the cure-all for all the ailments humanity can be into.
I agree, every inventions have its pros & cons but I think it's a good start with blockchain as to help lessen such issues.