[ajkjk]

That's not what the word 'opinionated' means here. It's not any one person's opinion; it's that the project overall takes a stance on an issue rather than leaving everything open for everyone else to figure out. It provides clarity and direction compared to the more difficult situation where every library is completely general. No ego involved at all.

[james412]

Perhaps I misunderstand the text in the README. Who is "we" in this case? Is the software writing its own README?

[ajkjk]

'We' refers to the authors and their organization as a collective. That's still the meaning of the word 'opinionated' in this context.