Why is it a bad thing? let's say for sake of argument that the tech works and it's significantly safer than human drivers. Is it still a bad thing? I read that there are on average 40,000 fatalities due to driving in the US each year. I can only imagine the world wide figure. And that doesn't include devastating accidents where someone is crippled for example and other serious injuries. No solution is perfect but lets say the figures drop to 10,000. Are you still against it? And are you only against it because of tech replacing people? Would you rather the figure stay at 40,000 simply for the sake of keeping humans doing this? (driving in this case)
You say tech is supposed to help people not replace them, I'm sorry but that's pretty much what all technology does. It does what was once previously done by a human. From bank tellers to automotive assembly to farming equipment and on and on. I once read an article talking about technology and it said it's going to eliminate capitalism. Capitalism at it's heart is to pay a human being for goods or services that person provides. Well, technology devalues that work and makes it cheaper.
So if you are against technology replacing people well you are pretty much against technology in general. What was once man work becomes machine work. It's been going on for ages since the invention of the plow, it's just that now we are going to see this accelerate at a very dramatic rate.