I actually have an avo tree taller than me that I started this way 10 or so years ago. It is in a pot, and our climate is a bit cold for them, so I move it into the house in winter.
These are normally outside, just hiding from the worst of the winter.
The only reason I know what your talking about is because I was just watching a thing on apples about this subject.
It’s true of most fruit trees as I understand it.
And a bunch of veggies too. Peppers are notorious for cross breeding.
Peppers are fruits! In botanical terms anyway.
Vegetable is a culinary term not a botanical one.
Cross breeding yes - but you usually have edible peppers from the crosses.
Crabapples are what you get when you plant apple seeds. Nearly inedible when compared to the fruit it came from.