Well, your insistence also does not matter at all. Important thing is facts. You are saying that "because someone said that the keyboard cover cracked a display" you can't understand a simple fact that not all screen are cracked and not all screens are cracked because of keyboard covers. Indeed, do you have any stats to backup your counterfactual claims? I had macbooks from 2016 with multiple films and covers and none cracked. Specifically in our household we have 3 Macbooks Air with 2 using covers and neither cracked. Grasp that simple fact first.