Shigo urged the same thing when he said always shoot to make the target cut perfectly... That teaching is completely unrealistic and has continued to plague the tree care industry for over 40 years.
One of my clients, a surgeon, turned me onto this saying:
Perfection is the enemy of good.
It's actually more applicable to stump grinding, where it's often better to leave a little distance between the edge of the stump and the fence of driveway etc. than to falling.
To me, perfection is doing tree work the fastest, safest easiest way. If I was a faller, dropping trees all days every day, I would focus on saving an extra 20-30 seconds per cut, but when that time is almost irrelevant given the number of trees I actually drop, I AM much more concerned with falling accuracy, which allows me to drop trees that my competition is climbing, rigging, or craning. I've made a decent living doing just that for the last 20 years.
This cut does offer noticeable strength to the hinge which together with the pulling power of a high line and skid steer gives me the confidence to drop a good percentage of trees that I would otherwise not be able to chance. Being the only one in my market that has the ability to drop some hairy trees provides a good payday, and saved the client big money. There is some video of me doing this, but many more times that I didn't want the distraction of video when I need to focus on the cutting.
And as I have said before I have also developed cutting techniques that allow me to dop certain trees accurately and twice as fas as a skilled commercial faller like Stig.