I am always caught by surprise in this day and age when I play with somebody who is serious about their game and does NOT have a range finder.
But the constant that I find with those guys is how often they ask you to tell them a distance. Not just to the pin, but to the water. Or a bunker. Or the big tree on the corner of the dogleg.
I get the purist arguments; I really do. But not only has that genie left the lamp, never to return, but there's another side to this that I'm dealing with at age 68. I've had 8 procedures on my right eye in the last 3 years, and it's just shot. My depth perception is completely screwed up, and without some sort of help with how far to hit the ball, I'd be lost; not sure I would enjoy playing anymore. I'm still playing to a single digit, and still playing competitively as much as I can, but I don't think I could do it without the help. I've learned (and am still learning...) some "workarounds" for chipping and putting, which have become really problematic, but the distance thing doesn't work that way.