A radical new suggestion but I suspect writers really need to write not only from life but also from nonfiction. Maybe that’s my personal bias but something needed as to lessen the usage of stereotypes and cliches. I mean it does suck that characters would sometimes act in a repetitive way almost to the point where there’s no doubt in subverting said cliche when all that’s needed’s to get new life experiences and interests.
Simple on paper, hard in practise. But it does seem really odd why not too many schools recommened that one has to write from life never mind that most writers don’t really start out having a writing career, let alone in fiction where somebody might have to do other things first. I suspect writing from life doesn’t sound attractive even if writers inevitably do it anyways. As is gaining new interests and experiences over time.