> Isn't there a serious risk of bias, there, though? For example, if a journalist is specialized in CS and have to write about the ecological impact of technology, you can expect them to be biased in favor of technology, even in good faith.

All journalists are biased. Pretending they can be unbiased is silly.

Beyond that, a journalist specialized in CS writing about the ecological impact of technology is no longer "sticking to what they've studied and know" any more than a sportswriter would be writing about the ecological impact of a new stadium.