They’re an invasive species, thus the euthanizing. One trapper had collected a couple that were 6’ long - yikes! They also have salmonella in their mouths so if you get bitten, it could be a bad thing ... you definitely don’t want them warming up if you’re handling them.
Burmese pythons & African Rock pythons are also invasive & FL has a program to try to deal with them. If you are interested & want to see some interesting video, check out the videos by Chris Morgan of The Wild (if you are ‘triggered’ by snakes, especially very large ones, don’t go there!):
Invasion of the Burmese Pythons: Part 1
https://www.youtube.com/watch?v=7UAYkviGca8
Invasion of the Burmese Pythons: Part 2
https://www.youtube.com/watch?v=mfIHDFbIcTo
Qiviut; Pythons...they started finding decapitated pythons and determined that bobcats have figured out how to dispatch them (most of the time...). Perhaps the cold will slow them down and make hunting easier for a while.
King snakes and one or two other native snakes eat the young pythons, and I think that they have re-introduction programs to increase their populations.