I can understand advocacy, but as lostgame says, Corellium is basically riding Apple's coattails.
If they were helping Apple, then I doubt Apple would be suing them.
I understand the way that Apple thinks on this. It isn't "bullying." It's brand protection. I worked for years for a corporation with a legendary brand, and they went to great lengths to protect the integrity of that brand.
Part of protecting the integrity is to prevent others from diluting it; even if what they do is net positive, monetarily, it may damage the brand. A company that values its brand can't let that happen.
Branding is a very different world from what most tecchies do. The priorities are drastically different, and a lot harder to "pin down."
A well-curated brand can be unbelievably valuable, though. Apple's brand is one of the top five brands in the world.