Depends on how far you hit off the tee. If you’re in the 200-220 range, they aren’t much useful. I hit 260-300. From the blues on most courses (6200-6500) the 150 markers are a good idea of the area my ball will land, so I like them as a reference tool.
I’m not bragging, just saying how it is.
No I mean using the rod as a line of sight/directional. I have only played a few courses in my life that the topography was seriously aided by those or the extended pin flags.
I always check the yardage before a shot if the info is available. I have gotten pretty consistent with my clubs so I have to trust them.