Scott is a good guy and a good instructor. There are others out there as well, but lets face it, the vast majority of gun owners get no training.
100% correct , or even attend a competition to see how they actually perform under a modicum of pressure.
Now back to red dots, 100% on handguns at this point especially sub and micro compact guns as it eliminates the issue of sight radius. Also shooting with both eyes open has made transitioning to shooting shotgun clays a lot easier than normal I think.
You don't need training if you do your own research and practice enough on yourself but again most do not. I would venture to guess the average number of rounds through a handgun in America is less than 200 for sure.