If it is merely traffic changes, why is the customer not getting a cheaper ride if the route is shorter? If the customer is paying more, why isn't that money going to the driver?
One of the beautiful aspects of Uber over say, taking a taxi, is that you only pay the one price no matter what. You don't have to worry over the route. You don't have to do anything other than get in a car and know you will get where you want to for the price you agreed to.
Also, if there is a fare left over, why should it go to the driver? Uber isn't existing to just get rides for drivers and forward all proceeds to them. They are a giant company that needs to be making money off of every ride. A lot more money than they are making now if they are ever going to be cashflow positive.
So that comment asserts: 1. When using Uber you lock in the price upfront. 2. People like to be certain about prices. 3. Uber is capitalist and likes to keep money. 4. Uber has profitability issues.
All of those look true to me. What part do you think isn't true?