Yes, but they're also choosing the monitors that pass QA best. It may be that all of their monitors have zero defects, but that is statistically unlikely. Look

Yes, but they're also choosing the monitors that pass QA best. It may be that all of their monitors have zero defects, but that is statistically unlikely. Look at chip manufacturing. They really care about high yields, but there are always defects, 20 years ago and today as well. It's an issue with manufacturing in general. Perfection is typically impossible to achieve. Maybe not always, but typically. Back to the main issue, since modern monitors are quite high resolution, you and I might both have a few dead pixels, or more likely a few that have pixels that are half-dead (dim) in one channel (of red/blue/green), and we just don't notice on our desktops -- and it would usually take careful examination to spot them even on a pure white screen. Your mileage may vary, of course.