Mad cow disease are found in brains and bones and such, however they it didn’t start in Asia.
Recently Taiwan decided to reopen it’s import of beef from USA even though it’s not exactly safe yet. Why? People say it’s political pressure. I don’t know.
Again, there are quality meat around that isn’t treated the way most others are, so you can’t really reject meat simply because of one assumption. You do have to pay more for the quality, but that’s also exactly why we are where we are today.
So in terms of assumptions, I don’t know if I have any more assumptions than you(melovescookies) do.