Let’s assume you have a mole problem.
Moles keep digging holes in your lawn.
You don’t want to be cruel to nature, ie: use rat poison or exterminators.
You’d like a natural solution.
So you decide to get a mole snake.
Mole snakes eat moles, no more moles, all natural.
Except it turns out snakes are very territorial.
If you move a snake from one geography to another you risk introducing new diseases to the ecosystem, killing existing fauna.
Not only that, it’s illegal to put a snake into the wild.
You thought your simple solution had solved the problem, but turns out you messed up the local habitat, and you broke the law.
Beware simple solutions.