About the freezing & killing of parasites in raw meat...I think it works for mainly fish & wild hunted animals. Most raw feeders are very careful in resourcing their raw meats, most come from local butchers & suppliers of human grade fresh meats.
I would be more concerned about the 4D meats (dead, diseased, dying & disabled animals) that go into making kibble. Just sayin.
Myths About Raw: Will my dog aquire parasites from raw meat?
Freezing meat can help kill many parasites (such as the parasite present in salmon that CAN cause a deadly disease in dogs; freezing fresh raw salmon, steelhead, trout, and other salmonids for at least 24 hours before feeding effectively disposes of the parasite. Cooked salmon does not carry the parasite.). As long as one exercises caution in obtaining their meat, parasites are a non-issue. If feeding fresh salmonids or wild game, it is recommended that the meat be deep frozen for at least 24 hours before feeding for salmonids and one month for wild game.