A good writer can tell any story they like. However, one of the hallmarks of the crappy author is the inability to spot the stories they aren’t qualified to tell. All the male authors who write their women boobing boobily down the stairs being an obvious case in point. This is how we get the dominance of stories in which the only gay people are having unhappy coming out experiences and dealing with abuse. It’s how we get miracle cure disabled stories, and all kinds of fantasy disability. It gives us bad takes on history, and the thoughtless repetition of racial stereotypes.
Whenever you set out to tell a story, it’s worth asking why you want to tell this particular story in the first place. Also ask what qualifies you to tell it. If the answers involve current writing fashions, or some superficial awareness of the subject that should make it obvious that you are not, at this stage, qualified to tell the story. Good writing involves research, and if you don’t have a rich body of experience to draw on, you can tackle that by dedicating time to finding stuff out.
This is also an issue we can consider as readers. Whose stories do we buy and consume? The creative industries tend to favour white middle class men. Often the depictions we see and read of anyone outside that narrow category, are created from the outside. That increases the risk of prejudice and assumption, or of treating the characters as exotic and other. I don’t want to read stories written by men in which the inside of female heads are dominated by an obsession with their own breasts. I don’t want to read weird middle class fantasies about what poverty might actually be like.
A weak author tends to assume that everyone is basically like them. Thus they don’t do any work exploring the differences between people. They don’t actually imagine other ways of being in the world, or how experiences different from their own might shape a person, but project bits of themselves and their assumptions into a variety of bodies. This is how we get disabled characters who are only tragic or heroic and women who have emotional melt-downs over broken nails.
Often, when people are allowed to tell their own stories, what emerges is strikingly different. Queer authors don’t tend to write stories about how hard it is being queer. What you get instead are characters who are queer, who have queer friends and queer relationships and a main story that is about them doing some stuff. Also, happy endings, because people usually want to see people like them wining and that’s sadly lacking when stories are written about ‘the other’. People from the global majority don’t tell stories centered around how hard it is not being white – why would they?
A good author isn’t simply someone who could tell any story, but is someone who will know what stories they can tell to best effect. A good author writes what they know – and will undertake to make sure they know before they start writing. As a reader, you deserve the work of people who know what they’re talking about, not the misleading fantasies of the empathy-impared.
“Cassandra woke up to the rays of the sun streaming through the slats on her blinds, cascading over her naked chest. She stretched, her breasts lifting with her arms as she greeted the sun. She rolled out of bed and put on a shirt, her nipples prominently showing through the thin fabric. She breasted boobily to the stairs, and titted downwards.”
And you might want to read this much more details and far better referenced article on the limits of how we imagine each other – http://lcfi.ac.uk/news/2018/sep/7/can-we-understand-other-minds-novels-and-stories-s/