This technology purely exists to make human drivers redundant and put the money in the hands of big tech and eventually the ruling class composed off of politicians risk averse capitalists and beurocracy. There is no other explanation for robo taxis to exist.

There is another reason, though, and it's much simpler. Basic greed.

There are people who see the opportunity to make more money for themselves, so they'll do it. When it comes to robo taxis, they're not interested in class struggles, it's not about politics, their interest in making human drivers redundant extends only so far as increasing their customer base. These aren't Machiavellian schemers rubbing their hands together and cackling at their dark designs coming to fruition, it's just assholes in suits who's one and only concern is "number go up."

Even when it comes to their politics and to the class dynamics, their end goal is always the same. Number go up. They don't care about what harm it could do. They're not intent on deliberately doing more harm, they give no thought to doing less harm, they do not care. All that drives them, ever, is Number Go Up.