Re: Snake oil
This is the problem when you assume that what you don't need is also unnecessary for everyone else.
"Self driving cars are a particularly good example. We don't really need self driving cars."
Let's see your arguments:
"For occassions when we don't want to drive, there's taxis."
Unless you're traveling in a way that taxis don't want to. For instance, a long distance that isn't already covered by public transportation. Taxis work in cities, not so well in suburbs, and may not be available at all in rural places. From your comment, I'm guessing you've got access to taxis at convenient prices and wait times, but not everyone does.
"The "work whilst your travel" argument has been lost, because if you can work in the car on the way to the office one can also never leave home in the first place and acocmplish the same thing."
Unless, that is, you might have to travel somewhere and still want to work. You don't have to work while commuting to an office, but what if you have to drive out to a variety of locations during the day and could work while doing that? Or what if you want to travel to somewhere else and to do something, work or leisure, while you're doing that? I'm guessing from your comment that you mostly drive to commute or used to do so, but that doesn't apply to everyone.
The many other purposes of automatic driving weren't considered. There are many companies that want to have those for automated cargo delivery. The human drivers don't like this idea, but the people paying for deliveries would like it if it can be done more cheaply. People who cannot drive may like the idea because it gives them independence in transportation that they now lack. People who like to go on road trips may appreciate doing something else while still using their preferred mode of transportation. Families with only one car may appreciate the ability to send the vehicle unattended to pick someone up rather than having to do that work manually. From your comment, I'm guessing that none of these situations apply to you.
Be careful when you say that something is a pointless waste of time that nobody needs. Sometimes, people have different circumstances to you which is why someone is spending money trying to solve their problem. If all the things I don't like and would never buy did not exist, your life would likely be less pleasant than it is, because it is quite likely that some of those things are things you use frequently.