You have a valid point and argument. However, it is also pertinent to note that we need government's buy in for Bitcoin to become generally accepted. As it is now, there is no strong structure around the cryptocurrency. Unlike uber, we are talking about something major. South korea for instance is planning to pass a legislation that could ban Bitcoin trading and this is already causing the value of the cryptocurrency to plummet.
With time, governments across the world will start to experiment with their own version of cryptocurrency and this will bring about crisis with the existing system. Hence, there should be some kind of synergy with governments and central banks to ensure a very strong framework and structure around bitcoin and other cryptocurrencies