So the root of the incompatibility is essentially that even though both the GPL and Oracle open source licenses offer similar protections, they both are not all

So the root of the incompatibility is essentially that even though both the GPL and Oracle open source licenses offer similar protections, they both are not allowed to be combined with other licenses. Obviously you'd hope that if Oracle licensed it under a permissive license, the whole point of doing so was to enable third party usage and thus they won't be taking legal action against this kind of minor and technical infringement (if it actually is). However counting on Oracle the company to act in good faith might not be smart.