Now why would Darwin have screwed up so badly on that one? Well, for one thing I doubt a gentleman of his breeding would have imagined that very many people would be interested in going to the trouble of catching gamey wild pigs when they could just buy one off a passing Arabian pig merchant.
Many of the detail explanations for "evolution" have that problem ~ the genius behind them has prejudices that he or she cleverly works into the structure to hide what really happened.
I guaran~tee them ol'countryboys way back when were HAPPY to catch wild pigs, and happy to turn the boars into fat roastin' hogs, and were even happier to hold back the females that had 12 or 16 piglets and let the little two-bangers show up over in the tandoor for Saturday afternoon's roast.
You can't grow up in corn and hog country without knowing what is meant by "the technology" ~ it's a fence with a top ~ and a knife sharp enough for the nut cuttin'. Ain't no more complex than seeing it happen!
Darwin simply didn't spend enough time on the growing side of pig culture to bother with thinking about it all that much ~ the boy loved birds though.
And puppies. Don't forget puppies.