> tend to stick to what they've studied and know.

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.

While what you're suggesting seems common sense and is indeed better than current situation, I think it could be even better if rather than having one journalist writing one piece, every piece was a joint effort by several journalists, some expert on the subject and some not.