Your eyes can work that bit out tho, especially over 150 yards you can see you roughly rolled X amount of yards

Also can look at where your pitch mark is on the green and work it out and minus from the distance

Also can look at where your pitch mark is on the green and work it out and minus from the distance

You're assuming you hit the green all the time

What about longer clubs? On my course, on some holes, we can get 70+ yards of roll in the summer, less than 10 in the winter.

Total distance can be useful but the variability of the ground conditions that allow roll out skews the numbers.