Anecdotes do not equal data. Your personal experience with either situation says nothing about the underlying trends.
Your doctor doesn't take your oral history for fun, it's data. Now, just like a medical doctor we should weigh anecdotal data accordingly, but it's still data.
Here for example we can tell BMW/Audi reportedly sometimes make production errors. Tesla reportedly don't always make significant (to the commenter) production errors.
Sure, that's not terribly useful. It's still data.
/bugbear
The doctor takes your oral history to assess your health. Knowing that $x percent of family tree has high blood pressure means they can more accurately assess your risk of high blood pressure. For the population of “literally you”, your oral history is data. Now, if the next patient came in, and your doctor said “well, the last person in here has high blood pressure, you might have it to”, that’s an anecdote.
Similarly, telling somebody ~”My instance of $product worked great” isn’t really useful info for them. That’s a sample size of 1 out of a massive number.
Plus, Tesla has very high consumer satisfaction and low maintenance cost. Is that enough data for you?