Yeah, they should've have specified natural evolution.

It's not even selection, though.

We grafted those citruses into existence.

They're delicious Frankenstein style abominations unto nature.

It is different if it is a passive or active process though. The initial question is, in how far lemons benefit from this evolved trait. The benefits might be very different between passive or active evolution here. If it were passive, lemon plants might benefit by avoiding some disadvantageous animal species feeding on them. As it is active though, the benefit is that they are grown more by humans. The feedback loop between evolution and trait selection is very different if it is active or passive I'd say.

What even is "natural"? Aren't humans part of nature? If a wolf kills all white rabbits and rabbits become black thats natural selection, but if a human chooses which animals/plants get to reproduce it isn't? I say its still natural, as is climate change and any other thing human made. (Which doesn't mean it is good and we should continue doing it)