In the former, people sometimes accidentally stomp the gas instead of the brakes, then report the opposite.
In the latter, Tesla markets a feature as "Autopilot". It pilots a car into another vehicle. The feature had apparently been demonstrated at events with key safety features disabled: attendees are able to use it without their hands on the wheel. "Autopilot" fails to account for a common real-world traffic occurrence and its driver has an inadequate mental model of the feature, which is made up of a complicated mesh of sensors and software.
There may be something to the argument that self-driving car features will reduce traffic fatalities even as they become responsible for a distinctive (but hopefully small) subset of those fatalities. But this article doesn't make that point.
The problem people have with features like Autopilot is that it may not be reasonable --- at least, as those features are currently designed --- to expect human drivers to model their behavior accurately enough to use them safely. This is an HCI problem that people in the computer industry should be very familiar with. I'm surprised to see it dismissed so easily.