Write for your audience?

Writing gurus often say this. While they state many things that are complete garbage, like write what you know (Im not an ET, for example, nor know anything about real onesthats also a great rebuttal to all the anti-cultural-appropriation idiots out there), let me give all those so-called gurus the benefit of the doubt here and try to make sense of this advice.

I believe my first published novel Full Medical (2006) is as current and entertaining as my last, Son of Thunder (2019). (Therell be...