It's called Survivorship Bias and it's very real.
There's another part of "they don't build them like they used to" that people don't talk about, and that is the "Good 'Ol" products like toasters and tools from back in the day were an expensive luxury compared to what you can get today. If you shell out the money, you'll get a darn good product that will last, but today's technological advances have made it very cheap and easy to make a not-quite-as-good product that will still last a decent while.
There's also planned obsolescence and I'm not gonna get into that.