DxO's consolidated score covers so many things it's almost meaningless. I also don't know anyone who pays any attention to it.
But this score is derived from other numbers - direct measurements of sensor output, whose values DxO also publishes and which are repeatable by anyone who chooses to test the sensor themselves.
These values - SNR, ISO vs DR, colour depth, etc. - are the ones which matter, and the ones people actually pay attention to. How much each individual value matters depends on what and how you shoot; DxO's consolidated score is just one of many subjective interpretations.
DxO's interpretation may be subjective and not very meaningful, but the results and methods are both solid and objective, and freely available to browse. You can look at the data and draw your own conclusions, depending on what you value most in a sensor.