(I asked another question about this novella here.)
In a novella I'm writing, I explore the lives of a young Hispanic woman, Ramona, and her brother, Rafael, in an Orwellian-esque future America where Hispanic immigrants and citizens alike are persecuted. Ramona, give or take, is me, while Rafael is my brother. Their fears and experiences closely mirror my and my brother's own, with a bit of dramatic exaggeration (for example, we have undocumented relatives, but inside the novella, these undocumented relatives have been imprisoned or killed).
I can see ways this could strengthen my characters, by making them hit so close to home so I can really understand and showcase their feelings and thoughts. Are there weaknesses to this?