Lately, with the club speeds and balls I've been using, I think I hit the ding on non-putts about 70-80%. But I rarely miss ding, unintentionally, by more than 3 'hairs'.
On putts I think it's more around 85-95%.
I may not always hit ding but I plan for that 'margin of error' and factor that in for a rewarding result. *
I figure in the margin or error; there are a few things I consider.
* The wind conditions, circumstance, past attempts' record, etc. So, I factor in and I think about possibilities such as...
"If I hit the ding it will go here, but if I slice a little the wind will blow it in the water, a slight hook would be better than a slight slice."
So, if a slight slice is worse than a slight hook I'll adjust aim/power etc. to compensate. It all depends on things like success rate, past record, current reflexes, ball type.
Or, "If I ding it will go here, but in the past I always tend to slice it and the green has a cant left-to-right and then it rolls off, like at Pinehurst"
So, I always consider the results of a 'ding' but I have plan B and C - if I don't ding what is the worst case scenario? What has happened in the past?
I think many players use this same basic method.
"because sometimes 'dings don't work out like you plan them"