None of that introduces bias - that is how the system is designed to work. My car has automatic cruise control that turns off in the rain. It does that FOR safety, not to boost any statistics.
Bias suggests incomplete data or poorly sampled or manipulated - this is none of that. These are raw statistics on the functionality of a system - if you want to introduce bias to weight certain miles more than others that’s on you and you can do any analysis you want but Tesla is reporting what they should be - the raw statistics.