I have some RHEL machines at work. They are used as VM hosts for windows VMs (CAD software). I set them up, but I also have a huge list of other apps and servers that I manage,develop and support, and so the person that wanted these mahines wanted professional services as an option if I am out or busy with other projects. Plus it allows us to offload liability for security if need be, whereas when I do it, there is anyone else to blame, legally speaking. ( Although so far we have not had a breach on my watch knocks on wood )

I just use fedora at home, I find the they are about the same and I personally wouldn’t pay for the additional services. The package manager is different, but that’s about it.