Sorry, but installing arch linux doesn't mean you are some computer master. You are just following instruction on a wiki. Anyone could install arch linux if felt like, and wanted to put some time into it.
Some people make arch linux their personality especially the forum.
It comes down to audience. Arch is niche and caters to a specific crowd, as does Ubuntu, Debian, etc. The problem in Linux spaces is some internet tough guys actually think lesser of you for not being in the target audience of Arch, despite the fact everyone should have their computing needs catered to.