Yeah, I'm glad that they are trying to do a rate, the problem is that the numerator in the human case is likely far larger than what they are indicating.
Of the Tesla accidents, five of them involved either collisions with fixed objects, animals, or a non-injured cyclist. Extremely minor versions of these with human drivers often go unreported.
Unfortunately, without the details, this comparison will end up being a comparison between two rates with very different measurement approaches.
(The one thing I would like to see done differently here is including an error interval.)