I'd like to go on record as saying that writing is like any other craft in that if you study it and practise it, you'll improve. I'm tired of hearing people say writers are born, not made - that's nonsense.
I'll admit that a few have a natural kind of effortless talent for writing - in the same way that some people are born to dance, or have a glorious singing voice (isn't Susan Boyle delightful?). But most of us can, with time, patience and effort, hone and improve our writing, with results that range from perfectly acceptable, to work that is a pure pleasure to read.
The most important attribute for a writer is the desire to write. The urge and the need to get some words onto screen or paper - on a regular basis. The motivation to spend time doing that, even when they're tired, the ironing's piling up, it looks like macaroni cheese for supper again (chuck in a tin of tomatoes for variety and vitamins) and they haven't made love to their partner for over a month. And if people are driven to put pen to paper, or fingers to keyboard in the face of all that, who is anyone to give them anything other than help, encouragement and support?