We need a standard, but why CCS and not the Tesla one? One of those plugs has a network of great chargers, the other does not.
The only reason Tesla uses NACS in the US is that CCS did not exist at the time they started rolling out the Supercharger network.
I'm not sure why it matters what the rest of the world does. A charging plug seems a lot less of a change than say putting the driver on a different side of the car. Bonus points, you can even use a converter between the two plugs if you take your American Tesla to Europe!
As stated elsewhere in the comments, the European CCS charger and the US CCS charger are not the same.