To the original question, the anstwer is a huge and unqualified "Yes!", and not by a little bit. There are far, far more competitive amateurs at EVERY age than there were 30 years ago, and it starts from the ground up with junior golf. There are junior golf "tours" all over the country, with multiple ones in many states. High school golf is deeper and more competitive than it was 30 years ago, as is college golf. There is simply no comparison to 30 years ago, and even less of a comparison as you go back even farther. It ain't even close.
I won't get into a debate about equipment, but the changes had really started BEFORE the ProV1 generation and the 460cc driver era. The scores that would win high school state championships in the 80's weren't even close just a few years later because of the depth that teams had.
The golf boom starts with the baby boomers beginning to play in huge numbers, and their kids are the ones that provided the depth of good amateurs that we see today. More clubs sprang up, and that meant more junior programs, and so on.