The bigger reason is Sonarr and Radarr opens you up to a plethora of attack vectors and realistically at this point you're probably already compromised.
and that's totally ignoring the fact that it's only a supremely naive user that hasn't yet refined their filters to exclude dangerous extensions (or, if they're too lazy to do that, rely on one of the many many pre-assembled filter/grabber settings across the net which already do so.)
what fear-mongering and FUD-spread.
You may also want to warn the public about the dangers of having curl, wget, python or gcc installed.
They expose a PLETHORA of attack vectors! you're probably already compromised, realistically!"
... and they're actually more dangerous than a free-floating EXE.