I have to ask, when was the last time you even looked at a screenshot of Ubuntu? That script is from the Unity era. The first lines remove a shopping lense. Not a thing since 2016. And even if it was still somehow valid which it’s not, it’s mostly hardening the OS. Yes, stock Ubuntu is not an impenetrable fortress. No distro is.

Also the stupid script removes a local logging service which is not used anymore either, but here’s a thread about it https://askubuntu.com/questions/180990/what-is-zeitgeist-used-for