This article does not adjust for the fact that Teslas drive many more miles on Autopilot + FSD than any other brand. So it's a pretty worthless comparison.
"It’s not just that self-driving cars in general are dangerous for motorcycles, either: this problem is unique to Tesla. Not a single other automobile manufacturer or ADAS self-driving technology provider reported a single motorcycle fatality in the same time frame." Doesn't matter when mileage isn't what's being compared - it's whether or not others have caused the same problem - PERIOD.
Maybe the mileage on other brands is lower, because Tesla is unique in hyping as "full self-driving" a product that's not ready? It would still be a problem unique to Tesla then.