You have obviously never tried this. If you had, or seen it done IRL then you'd know how hard it can be.
What you don't see in the video is how many phones were destroyed in training the tech and while shooting to get the finished product.
I'm an IT pro, Android developer, and fix all kinds of phones. Sign in my workshop.
I DON'T DO SCREEN REPLACEMENTS
(if you manage to talk me into it, and I fry it, U SHOULDA READ THE SIGN.
I'm not a factory trained tech. The only screens I'll do are ones not. bonded to the LCD. If you can successfully separate these, my hats off to you.
Rather than criticize, do it, then come back