Maybe you want to migrate a PostgreSQL database to a newer version without starting PostgreSQL server.
Maybe you installed OpenSSH but don't want sshd to run yet, because you haven't hardened the configs.
Maybe you installed Nginx as a part of a migration from Apache httpd, but httpd is already running.
In addition, Arch hardly configures your system in a custom way, too. When you install a package, most of the time, it responds with "here are the files from the developer that you asked for."
If you don't like this philosophy, then your feelings are perfectly valid, and this is a textbook example of why different distributions exist 👍
It's against the philosophy of Arch. You configure your system the way you want.
So, like, you have to manually enable every service you install?
Yes, always.
In addition, Arch hardly configures your system in a custom way, too. When you install a package, most of the time, it responds with "here are the files from the developer that you asked for."
If you don't like this philosophy, then your feelings are perfectly valid, and this is a textbook example of why different distributions exist 👍