I've never had a problem. Probably you have some special use case that puts extra strain on the weakest link in the cord. Don't worry about it, you are the person warranty replacement is meant to protect.

Occams Razor tells me the Ear Pods are well made, given that Apple replaces them for free during the warranty period, and if you are nice to Apple Store personnel sometimes even out of warranty.

I have lots of criticisms of Apple, esp. the long delays in refreshing the Mac lineup. But of all their flaws, not knowing their costs ain't one of them (esp. with Tim Cook in charge), and so is not fixing them when it becomes a problem.