Can anyone be taught to be a writer? I sort of doubt it, but anybody can learn to structure a coherent essay, and if that's interesting to read then that's a good start. Many lines of work require that. For writing, talent helps, so does IQ, curiosity, observational power, and wit.
I have always (like so many, because music is harder) aspired to be a fine writer, but I lack the talent. I can do simple declarative, mostly grammatical sentences, but that's all.
So You Want to Be a Writer? A review of Why They Can’t Write by John Warner