Then why does the freight sector, and in this case, AMF, have so many accidents?
I'm talking about a simple numbers game. It's a simple question, how do we run a large scale operation without killing people on a regular basis? Pretty much the entire passenger carrying airline world has figured it out. The vast majority of flight schools have figured it out. Most corporate operators have figured it out.
Yet freight pilots keep dropping out of the sky and it's business as usual.
You can't really compare an airline, or a flight school, or a weekend GA flyer, to a freight operation. The former flies good equipment, the latter doesn't bother flying if he doesn't really need to. Along with some other factors, freight flying of the 135 variety can be a far riskier endeavor than the other ops you mention. My airline, we lost a PA-31 and 3 C-208As in the span of 3 years, to various causes.
Accidents are not "just a matter of time" at solid companies. If my former airline were to have a fatal crash tomorrow, I would not be shrugging and saying, "it was just a matter of time." I'd be shocked and extremely curious as to what went wrong, because all of the day to day flying I was exposed to there wasn't even close to pushing the envelope. Excellent safety culture, excellent training, mostly excellent pilots..
While they may not be a matter of time at solid companies, that doesn't mean that accidents don't happen. Excellent safety culture, training, and pilots, don't always = 100% safety. There are a ton of things to throw a monkey wrench into the mix of any flight, including humans and their limitations or faults.