I think I understand what you're saying.
I was just thinking that if page.php/blah-blah-blah can work, why not news.php/yada-yada-yada ?
I guess with page.php they could be all different pages, but with news.php they are all just the same page (i.e., the news page, but filtered on cateogory).
Anyway, I now have clarity on what works and what won't. The question can be considered closed. Thank you for your response.