The difference is in the compare. A collision avoidance system is there to help correct driver errors, so even if it only works 50% of the time it is still a ma

The difference is in the compare. A collision avoidance system is there to help correct driver errors, so even if it only works 50% of the time it is still a massive reduction in the accident rate. Whereas with autopilot the expectation is that it should be recognizing objects as good or better than drivers, so a 50% failure rate would be considered massively buggy. Note: Tesla also has a collision avoidance system, which is actually on all the time and a distinct feature from autopilot (although it uses the same underlying sensors).