You should not do that. Things can break. Your user configurations are stored in .config and Your System configurations stored in /etc/ are used by your system. I wouldn’t recommend it.
Programs may read from /etc, but it’s not recommended. Instead, I recommend having your .config directory stored somewhere, or preferably, have all configs in a git repository (often called dotfiles) and deploy them on systems for example with stow
System wide configuration files
Is it possible to tell my OS that it’s always going to have only 1 non-root user and relocate all the
~/.configinto/etc?You should not do that. Things can break. Your user configurations are stored in .config and Your System configurations stored in /etc/ are used by your system. I wouldn’t recommend it.
Programs may read from /etc, but it’s not recommended. Instead, I recommend having your .config directory stored somewhere, or preferably, have all configs in a git repository (often called dotfiles) and deploy them on systems for example with
stow