>AWS is about learning and memorising GUIs, not real skills, and those ‘skills’ become useless anyway as soon as you move to a customer/server that doesn’t have AWS

This is not my experience with AWS or Red Hat whatsoever. Most, if not all AWS users I've worked with use languages like terraform and emphasize importance of Infrastructure as Code, _not_using the GUI. Cloud concepts are more important than the GUI.

The same goes for the core concepts behind Ansible/Openshift. Both are not only available free, but they emphasize IaC over GUI.