I hope others are less judgmental of you than you are of them next you make a mistake in life.
You can be compassionate for a mistake and still insist someone take ownership over this own careless error instead of blaming others. You mistake compassion for “let them do or say whatever they want because they are a victim”.
The main takeway that I took from that article was the seemingly low effort improvement that could be made to the UI/UX of that action, which could help other people not make the same mistake.
That's not about blaming Github vs. themselves, it's a reasonable critique of an existing system and looking for ways to make it better for everyone.
Unless you think there is no room for improvement in that system at all.
You must focus a lot on blaming in your life if that's what you mostly noticed when reading that article.
There's no way for either us to really know the author's intent or what he thinks - beyond the words on the page - but you seem convinced that "where the blame lies" was a major motivation, even thought it's all between the lines even by your own admission.
I read it differently, so as I said earlier, let's agree to disagree.