The reason he didnt crash is because he is really good and really experienced. Your quad can come back and land at the flick of a switch but does it know not to hit a person while its landing or flying back. The whole "rely on GPS" to compensate for a lack of flying skill is short sighted, IMO.
It is programmed to first go vertical up to 50m, then come back. And the 50m is programmable. So you just need to use experience and judgement to not fly underneath something (or just be aware if you do), and to set a return height that should clear any obstacles. 50m is pretty good unless you're in a city with large buildings.
My point was not that flying skill is meaningless. My point is that the LOS rule does not make you safe. There are probably lots of people flying FPV without the skills necessary to safely return should they have to rely on their spotter.
Apparently the LOS requirement for FPV that is within the AMA code has in it terms about "LOS, within range that you could still fly it back 3rdPV". I guarantee you, 99% of the people flying FPV are NOT following this rule, and could not return with the help of a spotter. Because if they were, they'd be flying within 100m, the same distance you'd fly at normally. And then what's the point flying FPV at that range?
If I had to between LOS/Spotter and GPS, for long distance, I'll take the GPS, thanks.
The bigger point to the whole thing is that multicopters, flight controllers, etc are attracting a LOT of new people to the sport who get into it thinking that's it's easy, and they don't really need to learn to fly. And I think that's backwards. You need to learn to fly normally FIRST, and then FPV, FC, GPS, etc. all of that ADDS to your abilities, not a replacement for learning to fly.