Also, even zsh scripts don’t read your .zshrc by default.

The author seems to be Ellis Rosen (I searched based on the signature in the comic)

As far as I know, if the vehicle’s top speed is not above 6km/h, there are a lot less rules in Germany, e.g. you don’t need a license and also no TÜV certification. Don’t know how fast a barbie car goes though.

Do most packages usually have a manual entry ?

Usually there are manual pages for commands, for libraries and drivers like libwacom it is less common, and they are not necessarily the same as the package name. Some packages also just have a Readme file or an HTML manual installed under /usr/share/doc or similar.

When unsure, I often just check the list of files that belong to a package, most package managers can do it. E.g. on Debian-based (i.e. apt using) distros, dpkg -L $packagename will list it, in arch based distros it is pacman -Ql $packagename.