That sounds fine for those first 15 minutes and maybe first weeks though. What if a certain `curl | sh` fails after a month? What if I need some other stuff down the road? If anything the article's criticism makes sense from the perspective of needing to get work done, and omarchy seems to be focused more on the aesthetics. A package manager is exactly what is needed to get shit done instead of tweaking and troubleshooting stuff.
Omarchy is fine as an (opinionated) collection of dotfiles and configurations, but there are reasons proper distros are useful aside from wanting to spend time tweaking stuff or whatever. I don't see how the article talks about anything else than practical issues with it.