There is no reason to think of writers as an elite club of wordsmiths or anointed arbiters of taste and custom. Writers are just people who happen to write. And that makes you whether you are composing a term paper, an essay or any other piece of writing in which you are trying to communicate your own ideas to an audience a writer as well. Writing is an art. Well, not really.
Writing is more like a craft.
Like making clay pots or building a cabinet, it requires skills that you can learn by looking at good examples of master craftsmanship, working to imitate those examples, screwing up a lot, and doing it all over again. It involves trying something, usually getting it wrong, then figuring out what is wrong about it and trying again until you get it right. Most of writing, it has been said, is in fact re-writing putting something down on the page and then honing and revising it until it seems right. Not only is writing not an art, but art is not really an art either, if by creating art we mean a mysterious process in which your Muse sits on your shoulder and inspires you to greatness. Most painters, sculptors, and composers will tell you that getting things wrong, correcting mistakes, starting over, and failing miserably are all part of the creative process.