There have been previous threads suggesting that Continental's tire quality can vary. Perhaps some batches of their tires have had problems over the years.

Myself, I trust tires from companies like Kenda and Cheng Shin that produce hundreds of millions of tires yearly to be reliable. Think of all the OEM tires on both bike store bikes and big box bikes.

Especially the latter. The manufacturers of bottom-feeder bikes are impressively creative about coming up with ways to cheapen the parts on their bikes, but posts complaining about the quality of those bikes never include mentions of the tires failing under normal use, as far as I can recall.