AIUI the numbers are for accidents where FSD is in control. Which means if it does a turn into oncoming traffic and the driver yanks the wheel or slams the brakes 500ms before collision, it's not considered a crash during FSD.
Also how about: it turns into oncoming traffic, but there isn't much oncoming traffic, and that traffic swerves to get out of the way, before FSD realizes what it's done and pulls back into the correct lane. We certainly don't have data on that.
"To ensure our statistics are conservative, we count any crash in which Autopilot was deactivated within 5 seconds before impact"
https://www.tesla.com/en_gb/VehicleSafetyReport
Situations which inevitably cause a crash more than 5 seconds later seem like they would be extremely rare.