This is an ethical problem. You can rebrand RHEL as Oracle Linux, copy Red Hat's business model, and dump the work on Red Hat, but should you do that? Nobody at Oracle stopped to think about that question. According to the software license, sure. But is it ethical to exploit the good will of foss to these extremes? I would personally say no, especially considering Red Hat reinvests money into foss. Money now in the pockets of Oracle.

Imagine you develop a foss and license the software under MIT like everybody else does. Now a company roams around and makes your foss a core part of their business after a massive success. Perhaps they're the next FAANG company, who knows. You generated billions of dollars in revenue for that company, and never saw any of that. You regret your careless licensing decision, yeah. But at the end of the day, you will feel exploited.