Comment 3 for bug 1812003

they need to either chmod it, or remove it. Depending on the case, the right thing to do might be one or the other. Why not remove it directly? Because that would be surprising to the developer.
Similarly, if the user didn't chmod it, why would you? The reason it errors out is because neither behaviour is the right one every time.

Case in point, somebody wanted to include a README in the hooks directory. How does making it executable accomplish anything?