100% this.
Also, as tbg9b and randyks’ experiences have shown, the inherent difficulties and feasibility of a sexually propagated landrace are species-specific. A peach, apricot, or European plum landrace is doable and has been done. If you’re mostly interested in cider apples, you can grow apples from seed. With citrus, there’s no predicting what you’ll get, or so I have read, not including seeds resulting from apomixis. With grapes, unless you emasculate and hand pollinate every single flower, the majority of your seedlings won’t survive past the seedling stage and those that do will lack vigor.
I don’t envy the scientists trying to breed citrus greening resistance into oranges.