After installing the script, there's quite a bit of things that need to fixed right out of the box either because it causes an error or it's a security hole, and they're all common issues:
Sure users could just apply these fixes themselves, but it's jarring when there are things you have to fix immediately after installing -- or as soon as possible to avoid exploits. (and it's pretty easy to agree that the "rn" bug is the most annoying thing ever)