[aufhebung]

I think he might be trying to point out the fact that it ought to point you to your package manager, and not some dodgy shell script.

[AndrewDucker]

In that case, maybe they should have said so explicitly?

I don't feel like I should have to be telepathic to understand what commenters are trying to say.

[trumpablehump]

Rhetorical question: If they don't trust the project why would they trust binaries through a package manager.

I am sure the authors provide those shell scripts to ease the burden of installation for users so dragging them down into being "dodgy" is really really unfriendly.