yeah, they're doing the world a favour by taking the code and conform to its licence, as opposed to... developing a new browser engine which is... easier?
WebKit got forked into Blink, which is no longer under Apple leadership. Brave, Chromium, and the other major KHTML-derived browsers adopted this.
I can think of dozens of examples from Microsoft and Google, which are more "outside ecosystem" inclusive as a means of gaining mindshare. TypeScript, Golang, Visual Studio Code, protobuf, gRPC, ...
Other companies think of the things living outside their moat more flexibly, or their moats are less rigid. That's not to say that Apple's approach is wrong (look at their market cap!), but it has different consequences in terms of the open source code mindshare they cultivate.
