I think that was more of a case of "the man" rather than "the machine".
So... Basically, what you just said is that all this whining about inaccuracy and bad triggers and substandard construction really is just whining, because a capable man overcomes those obstacles and gets the job done.
Keep in mind that the Mosins used by those guys weren't handpicked. They got whatever they happened to get. I am with Cosmoline that the Mosins are great rifles. Certainly there are better rifles around, but when you factor in cost, ruggedness, ease of maintenance and reliability under a variety of conditions, I am a hard pressed to pick a better rifle.
Frankly, a lot of the complaints about the Mosin come down to technique, in particular the complaints about the safety. Certainly it isn't as easy as flicking a switch, but with the proper technique it is easy to use and about the most foolproof safety you can have. The other complaints can be overcome by simply bucking up and adapting to the tool at hand. Cooperites will all start screaming bloody murder at what I am about to say, but not every rifle needs a match trigger to be a good rifle. I own a couple of rifles with excellent match triggers, so it isn't as if I have no clue what a good trigger feels like. Bluntly put, if your finger can't effectively operate a trigger on a Mosin, then the problem lies with you, not the rifle. I tire of hearing these whiny complaints all the time. It's a trigger. You squeeze it. The gun goes bang. That it doesn't break like a thin glass rod just means you (slightly) alter your technique and carry on.
The fellow that posted before me basically proves the thing will shoot. Is that MOA? Nope, but we have become so spoiled and dainty about accuracy that we forget that good accuracy isn't just measured by MOA. Great accuracy is, obviously, but just because a rifle won't put them all into one ragged hole in no way diminishes what it can do. With the sights on the Mosin, I can hit paper plates regularly and easily out to about 200 yards with no real problems, and that is sufficient accuracy for just about any purpose outside of benchresting that you can name.
When I first shot my Mosin, I had many of the same complaints, but I also had a couple of hundred of rounds of ammo to work through, and I wanted to shoot that up before I sold it. The more I shot it and learned the rifle, the more I liked it. Oh, I have AR's and an AK and some other cool guns, and I like/love shooting those too. I wouldn't even waste my breath arguing against some of my guns being better guns than the Mosin, but none of them have the inherent potential of the Mosin. I even have other mil-surp guns that are better and more accurate than my Mosin (in particular, my Swedish Mausers), but when I start looking at those factors I mentioned before, I just keep coming back to it...
On a different note, Welcome to THR, Heavenlyfire!
