The larger the input lag the bigger the discomfort I have when typing and navigating a domcument. It’s doable but feels uncomfortable as we have to wait for the confirmation we hit the right keys. It helps not to look at the screen at all but if you find an error in the previous sentence it’s a pain to navigate back and fix it
I feel like this is distinctly different though. If you're drawing/sketching, does it matter the speed at which you can draw? Now think about how much of an issue input lag is. It's obviously not exactly the same but I think it isolates why your personal typing speed and input lag are different things.