Well put, so to rephrase: SELinux is not for most people and cooperation, therefore, it is sensible to just disable it, making RHEL less secure than Debian in practice.
Very much the wrong takeaway. SELinux is absolutely for people and corporations and has been for most of it's existence, and no, it doesn't make sense to disable it anymore than it makes sense to run as root because it's convenient.
If you are looking for a justification to excuse bad security practices, you won't find it in the origin story of SELinux.
Its very much for people who are trying to lock down their systems. Its also very much for people who want to meet the Common Criteria. It can be both. But for some people, its very much over kill.