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.
I flashed / revived a dying 2011 MBP the other month and really tried to use Pop!_OS on it, but the installer + GRUB just wouldn’t work.
Plugged in a tiny Arch boot stick (I swore I wouldn’t use Arch because I’m tired of choosing new WMs but guess who has Wayland now) and got it working with systemd-boot.
I’m just familiar with it and it works, and it gives me the control when it stops working.