But this isn't a story, literature, or a fancy piece of art; it's merely a technical blog post that discloses a security vulnerability. Here, the writing serves only as a vehicle to convey a message. Once you've received it, its purpose has been fulfilled. I would agree with you if the writing were an important part of the message, but here it is not. Not everybody can write well, and this guy clearly had something to tell, and that is what matters.
What "other platforms" are you talking about? Just an Android app would suffice. It's not a huge deal for a company worth trillions, especially if the features are already there and they're just blocking non-Apple products. If they deliberately do that, it makes you think they don't really care about their customers and are more interested in locking people into their ecosystem.
This approach is valuable because it abstracts away certain complexities for the user, allowing them to focus on the code itself. I found it especially beneficial for users who are not willing to learn functional languages or parallelize code in imperative languages. HPC specialists might not be the current target audience, and code generation can always be improved over time, and I trust based on the dev comments that it will be.