It's rather funny, too, because if you read what the AMA says, your spotter should be able to take over the craft for you if you should lose control of it. I kind of have an issue with that because if you're flying at 60-70 mph (which many FPV quadcopters and planes can do) and you lose control, it's pretty much over in a flash.
Really, the spotter is there for a myriad of reasons - to tell you, "Hey, you've got a child coming up the path," or "be careful where you're flying there, there's a dog walker at the end of the field," or "Your quad went down about 50 feet in front of you in that pile of tall weeds." Those are the biggest helps you can get from spotters.
I know there are guys who want to fly long range, and see just how far they can get their equipment out there. Right now, the FAA and the AMA are buddying up on this to prevent long range flights, so they can 1) see who the pilot is that might be flying in restricted airspace, and 2) prevent midair collisions with other aircraft (which has already happened; there was a guy who was flying his DJI Phantom 2.5 mi. out on the East Coast (I think it was in New Jersey?) and hit a BlackHawk helicopter that was doing military maneuvers. He couldn't see it, and it was on a "return to home" after it had lost video signal, being that far out. I personally don't think you should do long range - just because you CAN doesn't mean you should. For example, you may drive a Corvette that can do 80 mph in less than 1/4 mi. distance...But you shouldn't do 80 mph in a 25 mph school zone...
I'll admit that I have flown under goggles before without having that spotter. Am I violating the rules and laws when I've done it? Yes. I'll admit that I've flown in the wrong before, not knowing it was wrong at the time.
That said, when I fly, wherever I fly, I take precautions to prevent accidents - I don't fly when other people are around (unless I'm at a place where people KNOW it's an airfield and know to look out for aircraft, know the basic rules for safety), and I try to keep a boundary for myself (for example, if I'm flying at a baseball field, I keep within the boundaries of the field, and I try to keep below the top of the backstop fence or the top of the foul pole) so that I don't unnecessarily take risks. It's just safe...And if I see ANYONE coming up while I'm flying at a park and not at my club's field, I try to get down to terra firma ASAP. I'd rather not risk them deciding to run out under my quad with its whirling blades, or me turning and slicing them up into little pieces because I lose control when I see them at the last possible minute...When in doubt, best advice I have for you is to fly SAFE and SMART.