Do I misunderstand the wild–cultivated distinction?

No offence intended. To me, the distinction between plants and animals is less clear cut. If I stick a tree in the ground, it is cultivated. Same if I plant seeds. I guess the difference is ‘provenance’ - many plants are live for centuries, so if I see an old tree I don’t always know how it got there. But again, I have a relaxed outlook about this stuff, so ‘grain of salt’!!