Not sure what people's issue is here...
Logically, saying every knife is perfect every time is just not true if there's even a single report to the contrary. But that doesn't necessarily mean the maker has poor QC - I once received a Stretch with horribly wonky factory bevels (like 15 degrees variation along one side) from Spyderco, but seeing as how I've probably handled 50+ other Spydercos with nearly perfect factory bevels, I can't say that Spyderco has a QC issue. Their QC is fantastic (and so is Survive's, from my own and others' experience). The only takeaway here is that it can and does happen from time to time, and people reporting these incidents shouldn't be disbelieved simply because someone else hasn't seen it.
For example:
Person A doesn't believe there is such a place as Florida since they haven't been there.
Person B does believe there is such a place as Florida since they have been there.
Obviously, Person A's lack of experience doesn't disprove Person B's experience. However, Person B's experience does disprove Person A. It's not a two way street, and one opinion is obviously not valid. That's why blanket statements should not be used, especially in terms of statistical fields such as QC. A single incident can disprove them.