Tom, I was discussing from tee up to the green it is not tough. Chipping and putting is really tough and I believe the average 15 handicap will three putt about 9 holes fiche does not know the greens. Members do not three putt as much.
I do not play much in the US, but for example I found Spyglass, Stanford, Muirfield Village, Preserve, and Pebble to be much tougher.
Chipping is only tough for those that expect to get up and down with their chips. A large portion of 15 handicaps don't expect to get up and down with their chips. A 15 handicap might hit 3 or 4 greens in regulation. Those 3 or 4 are the candidates for 3 putts. The others greens will be a chip and two putts. Anyway that's how it is in my experience. How would that change if I went to ANGC? Are you saying I couldn't chip close enough to two putt?
I guess it depends on your short game and putting. I consider myself a better than average wedge and chip player, and a worse than average putter, especially for short putts. I play better on very fast greens than slow greens and my home course has super fast greens. I believe ANGC speed wise was about the same as my club the days I played and was comfortable with the speed. However, the greens have so much contour, that 3 putting is likely even from a short distance on many pin positions. It is just not easy to hit them firm enough to counter the brake, when you risk putting off the green if you miss the hole. I averaged 7 three putt greens per round.
I can tell you I have much more respect for the pros since then. At ANGC it is also key to be below the pin position on every putt.
As an example towards your chipping question, the first day on #1 the pin was set maybe 7 feet from the front, on a narrow portion of the green with severe slopes on 3 sides. I found it nearly impossible to leave a chip close to that small target from just short and right of the green. Anything short would come back to me, and anything long would fall of the green on the other side. Anything left of the flag ended up rolling back to the fairway as well. To that position, a 12 handicap I believe would think hard about playing further back of the green to a wider area and into 3 putt territory.
Based on personal experience, your number of 3-4 greens in regulation is way, way low. I think this is the biggest misconception about ANGC and well worth a discussion. I would love to hear the experience of other 10-15 handicappers.