Plus lax standards / lax execution of standards / lax control.
If the meat isn't tested properly, farmed animals are a source too.
You can test game for Trichinella spiralis just as well as farmed meat. Basically you use a Microscope and look for the capsules that contain the larvae, aka the cysts. Slaughterhouses test for it by exposing samples to enzymes that dissolve the meat (digesting it) and check the sediment. (I think they check for the material the cysts consist of, but I'm nut sure about this.)
Recently a new form, Trichinella pseudospiralis has been discovered in wild pigs.
Trichinella spiralis is best adapted to swine, so it's more likely to be found in pork and boar.
So I'd be wary of home-reared pigs not tested and not properly cooked.
Between 2002 and 2007, 11 cases were reported to CDC each year on average in the United States, these were mostly the result of eating undercooked game, bear meat, or home-reared pigs.
So considering the odds, I'd try it.