Little Snitch is a application based firewall for outgoing connections. It is not mainly an Adblock of any sorts. It may be used that way with filter lists, but that is in no way it’s primary goal or purpose.

My main point was that you don’t have to use it for blocking the other traffic, because Linux systems won’t have unwanted traffic to begin with, since you have full control over it.

That is kinda naive, and absolutely depending on what software you install and use. Thinking „there can be no unwanted traffic on my system, as I use Linux and am in full control“ means you either have VERY high faith no application on Linux calls home ever, or vastly overconfidence in yourself and your system. If there was absolutely no use in applications like little snitch, things like OpenSnitch or Portmaster would not exist for Linux either.

Somebody was banned for posting the GIF of the Nazi Guy getting knocked out (you know the one).

The community is not having it.