If they were in all cities already Uber would be dead. But someone, either Uber or market is not even reacting to this inevitability?

The time horizon on Waymo getting there is quite long. Uber is in every city because they don't have to build and maintain their own fleet. Waymo will have to. That's not only a massive capital cost, but a substantial scaling problem.

Because there's two decades of revenue between that happening and today.

It's far more likely that Uber buys Waymo than Waymo replacing Uber.