This might not be the right place for it - but I have to disagree with it on the greens.While you’re doing your thing, I should be doing mine. Goes for on the green too, which is why it’s interesting that some aimpointers wait until it’s their turn to do anything. I don’t get it. If you’re not on their line and your movement isn’t interfering, be efficient. You can always do something during your waiting.
While yes, you can do something - if I'm walking around, putting my shadow over your line or checking out different angles while putting I don't think that people would enjoy that very much.
Also, since the furthest person out putts first, everyone else might be inside of that line and field of view especially if one is long and one is short you'll be looking directly into the path or someone else. I have found out that most people want you to stand behind them or back and to the side when putting, not walking the green doing your own thing.