I suggested you demonstrate what you do using birds that are problematic. By what you do, I mean the approach you advocate.
I dont at this time have any "problematic birds", and have not had any in years. The exception to that would be some cockerels, and they go to the BBQ, but they were headed there anyway. I have 2 GEMs that I clipped their right wing 1/2-3/4 of an inch of the light flight feathers (just the frilly tips), not for jumping a fence but for flight. Flight is getting up, soaring, turning, in their case they were making 20-30 feet up and cruising around the farm. I did find it odd that they flue over an open gate rather than the fence,,,
I look for what they are looking for, as in the grass is greener on the other side of the fence,, it was, and in my case I have plenty of land and opened more pasture for them, issue gone.
When they were going out in the street (gravel road) for the grit, I used the garden tractor and a box blade on part of the run. Lots of tiny rocks exposed, issue solved.
And I find a fishing dip net is my best tool! They absolutely hate being caught in it!
Every bird is an individual, and everyone's situation is different. Not everyone has extra land they can open up, or a place they can grade for their girls, these folks will need to use another approach that achieves they same goal. Such as giving the girls lawn clippings (maybe from the neighbors), and/or a pan of grit,, etc..
common since goes a long way.
Have a nice day