My home course putting green experience is that the slope around the hole is usually close to the average slope for that section of the green. It's rare for me to find an 'unfair' pin placement at a location where the slope inflection is quite large or the slope extreme close to the hole.
As I am generally trying to stop the ball in or around the hole, I find knowing the fall line is useful in choosing what line to approach the hole with.
Maybe for the level of your game. You probably take a lot of your accumulated experience and putting knowledge for granted. I've found it helpful.
I know the putt is falling from the first moment it's struck. Yet nevertheless I have found this approach helpful in visualizing and practicing reading. It gives me a bit of a reference point around the hole. You recommend AimPoint instead. Got it.
No, never happened before cuz typically they all played the same events. Probably happened that the top 2 had won but never the top 3 players in the world. It is a special accomplishment which I expect CBS to play to the hilt next week, with good reason.
On your topic of parity, yes, touche, to some degree. But this is far from that. These top 3 guys are head and shoulders above the rest of the 200 tour players. Again, don't think it's ever been seen in golf, especially given the depth of field today. The other 3somes you mentioned were separated by age more than these 3. It's unique and will be acknowledged as such over time. I'm just trying to bring some early perspective on it.