And unfortunately that’s how arch is mainly marketed by its users. “Arch has the latest everything, if it’s not in the repos it’s on AUR” is one of the standard selling points.
Of course that speaks to how people use linux insecurely not how Linux is insecure.
Maybe most users just ignore that and always answer yes without inspecting it. I don't know. But the wiki for the AUR and Readmes for many of these tools have warning banners telling you not to blindly trust AUR packages.
There are more ways to attack people than third party software depos.
significantly so. Windows has a coherent story when it comes to permissions and access. Differentiated out access controls, least privilege, UAC, mandatory integrity control and all configured out of the box.
Without AppArmor or SElinux correctly configured, which it isn't on most desktop distributions in the linux world most of your apps can still read anything, there's little sandboxing. The NT Kernel was designed with an object model in mind so you always had the abilities to have rich descriptions and policies for whatever you're handling where all of that is bolted on unix systems after the fact.