Yes, in that nobody is owed work. I can take a glance at somebody's [art] samples and instantly tell whether or not there's any chance I'm going to hire this person ... but when it comes to writing, you need to read a decent chunk of material to find out if a would-be writer has got it. It's an inequity of the different disciplines, but it is what it is.Couldn't agree with Brevoort more, and he's right to say this applies to any kind of writing. There is no magical shortcut that saves you all the hard work required to make your writing better. Canny strategy may get you noticed quicker, but getting from good to great takes time and effort [assuming you already possess some latent talent].
If you truly want to write comics, or anything else for that matter, you've got to be ready and willing to put the work and effort into it that's necessary in order to get that big break. And that big break may never come, depending on your actual talent - but the best way to increase your odds is by doing the things that you know you need to do.
The guys that get hired are the guys who have not only the talent, but also the drive both to improve and to get their wrok in front of the people who can hire them... I'll shed no tears for would-be writers who are either too lazy or too entitled to get out there and make things happen.
There's a handful of writing competitions that can raise your profile. I was a finalist in the last Red Planet Prize. That got me on the radar of a few people [the finalists are read by some significant industry figures], and helped to get agents reading my work. But it was the writing that got me represented, that got me a trial script at Doctors.
The world is not waiting for your masterpiece. The world doesn't care. You have to make your writing so compelling, so compulsive, so exciting that it makes people care. Nothing happens overnight. So-called overnight successes have been working for years, even decades, to achieve that breakthrough. You want to make a living from writing? Make writing your life. Onwards!
UPDATE: Lots of interesting contributions in the COMMENTS section. Is talent plus effort plus strategy enough? Does writing have to be a calling? How important is having something to say through your writing? Where does storytelling end and preaching begin? Feel free to chip in with your own views...