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.