Because Tesla falls in the "startup" category in most people's minds (whether it _should_ fall in that category is irrelevant). And this is a forum run by startup investors, and frequented by startup investors. QED.
People rightly or wrongly revel in the fact that while Tesla has a reputation for being good at software, in reality they're somewhat shit at it.
This gives no insight of being "bad" or "good" at software.
There is no such thing as zero bugs. You will have to rollback sometimes.