> You need to get your speed and position right, and if you can't do that, you don't merge.

I agree, but my observation has been that the majority of drivers are absolutely trash at doing that and I'd rather they not crash into me, even if would be their fault.

Honestly I think Tesla's self-driving technology is long on marketing and short on performance, but it really helps their case that a lot of the competition is human drivers who are completely terrible at the job.