Your last question reminds me of my working days as a automobile dealership service director. I occasionally would hear a technician grumbling about product quality while waiting for parts at our shop parts counter. I would walk him outside and after chatting about anything for a few minutes, I would point to the busy highway in front of the dealership and ask him if he noticed how many of our brands of vehicles had driven by without coming in with a problem during our time out there. He would then smile, remembering that when all you see are the ones with problems, it's easy to form a low opinion of the product.
It's a fact that people who are dissatisfied or encounter a problem with a product are 10 times more likely to tell others about that experience than someone who has had a satisfactory ownership experience. The Internet and social media have only served to worsen that situation.
How many people own the type of S&W 1911 you asked about? Thousands, probably. How many have posted here about their plunger tube loosening? I can recall about six but to my recollection no one has mentioned that theirs has not loosened.
Well, except for me.
Ed