This is a straw man argument. I don't know of anybody on this forum who claims that driverless robotaxis are impossible or will not happen. I think most people even believe that Tesla may eventually produce such a car. The area of disagreement is whether the cars that they have been selling since 2016 will ever be able to do this in any practical way, and when that might happen if it does happen.
For the record, I answer "probably not ever" and "definitely not before the end of next year". But make note of the phrase "in any practical way" because I think they will very shortly demonstrate some semblance of self driving capability, perhaps this year, perhaps even next week. But it will not be practical in any way that will enable it to operate profitably as a robotaxi.