That's basically it. As a sysadmin, I supported over hundreds of Linux servers (mostly virtual) pretty much by myself. We paid the license so that if the shit hit the fan (and we really had no way of fixing it) we can call on Red Hat. At least, I could be able to tell my bosses that things were being handled.
I've used RHEL support too, believe it or not, while working as a DevOps engineer at Red Hat on www.redhat.com. And the support specialist assigned to my issue was very sharp and solved the issue quickly. Easy in hindsight but I was stuck so I reached out, and I was glad I did. It involved a segfault and grabbing a core dump and analyzing it. ++Red Hat Support
This never happened, of course. But it's CYA.