That's not the point. The point is that the door handles extending is linked to the gear the car is in, which it should NOT be. If I pull up to pick someone up, I shouldn't have to think "oh, crap, I have to PARK THE CAR before anyone can get in". That's just really stupid logic. It's faulty logic to tie those two things together WITHOUT offering some other DIRECT button to lock/unlock the doors LIKE EVERY OTHER CAR OUT THERE. Some cars have their door locks automatically when the car exceeds some low speed, but even that can be turned off as a user setting. It also flies in the face of a user interface STANDARD for people who might not know how the Tesla works, that there is no "Unlock" button anywhere in the car other than the GEAR SHIFT or the touch screen -- places someone in the car who isn't the owner would NOT know where to look.
Like I said, just because you CAN do this, doesn't mean it's right, and just because Tesla Motors does something, doesn't make it a gold standard all of a sudden. It's still wrong. Not everything TM does turns to gold.