That's a lot of effort to go to in order to get a few geese, unless the intent wasn't to only get a few, but rather to poach a whole bunch.
Easier than climbing into a ladder stand.
It was more than a few and very effective means for taking geese for the location.
And perfectly legal to boot.
That’s why a regulation was put forth. A senator and other politicians may or may not have been involved in the method of taking that was developed.