Having physical access (or IPMI) certainly helps, but there's also a lot more knowledge about networks bundled in companies that already run data centers, so se

Having physical access (or IPMI) certainly helps, but there's also a lot more knowledge about networks bundled in companies that already run data centers, so setting up something like MetalLB (BGP load balancers) and Rook (Ceph CSI) to cover the parts that your cloud vendor would usually provide automatically is not as big of a deal. But the overall complexity for someone completely new to the topic is still higher.