Your understanding on what sys-admins are/do is very limited/off-base. I'm a sys-admin for engineering department of a public university. We use Puppet and Ansible to manage a diverse array of workstations, compute servers, and storage servers all hosted on-premises. These machines exist to serve undergrad student lab needs, research compute clusters, and public and internal infrastructure.

There is a world outside of your bubble where servers exist to run a product.