There are humane alternatives. Why aren't they being used?

Tow-and-Collect Machines: https://towandfarm.com/us/product/towandcollect-1500pro/
Trained Dogs: http://hardeybordercollies.com/id2.html
Landscape Modifications: https://www.flightturf.com/wp-content/uploads/2020/03/Canada-geese-and-deer-deterrence-20200324.pdf
Goosinator: https://goosinator.com/
Coyote Cutouts
Solar Floating Devices
Drones, Balloons, Noisemakers
https://bird-x.com/interactive-problem-solver/geese-control/
Banding of Resident Geese
Motion-Activated Sprinkler