No. In fact I always mention that most knives from any successful company will be problem free. Otherwise they would be quite literally out of business.
Yes, when you buy a ZT chances are you will get a great knife with no issues. However, it does seem that a higher proportion of ZTs knives have issues that go beyond the cosmetic. It is a combination of manufacturing processes and improper QC that cause knives with functional problems to be sold. Lack of care & attention in either or both can result in a higher proportion of a particular company's knives having these problems.
"If you don't like it, sell it" and "just send it back" are tiresome excuses. I'm buying a product because I want that product. If that product comes with a defect and I am forced to sell it, then I have to mark it down due to the defect, plus I don't have the knife that I initially paid money for. If I send in the knife for an issue to be repaired (an issue that should have been caught by QC in the first place), I assume the shipping risk and fees and have to wait weeks for the knife to return.
Neither of those cases are what I would call a positive experience.