I didn't say it's 0.1" tall. I just said that of the diagonal across the screen, corner to corner (that's what the 14.2" inch is measured from), only 0.1" goes through the notch area. If you remove the notch, the screen is like 14.1".
That whole horizontal area of notch cannot really be used that much. For other laptops, 14” is a real 14” rectangle without notch and this is much more practical.