Samsung literally tells you not to replace the inner screen protector yourself.
And the FDA tells you not to cook your steak rare.
That's not completely true. The FDA rules are an oversimplification because the actual rules are complicated.
Chris Young has a video about this: https://www.youtube.com/watch?v=bbaZpJ1AhFU
Rare stake is fine; it's rare burgers that are a risk, because bacteria can get ground into them.