I recently received an email from a student, with this question, "How difficult is it to enter into the publishing world for a writer? I understand and accept that it's a competitive field, but would a GOOD writer have very extreme amounts of difficulty selling a work which deserves publication?"
It's not surprising if you've never been given a straight answer because being published is such tricky business, especially as the industry changes so much. I do believe that if a writer consistently works to improve his/her craft and is relentless about improving the craft and submitting work, he/she will get published. Starting small is helpful - stories or essays in journals/lit magazine helps build one's confidence and craft - those are important carrots to weave into one's writing life. There are probably 1,500 people in the US, apart from screenwriters, who make their livings as writers, and this includes folks who are wildly successful such as Stephen King, Anne Rice, etc. Most writers have a day job . . .
This may be super frustrating to read, but being in it for the process, rather than the publication, is probably helpful. It has helped me focus on healthy factors I can control:
-finding joy in figuring out plot and character, line and image
-creating a community of people who are also committed to process and actually hone their craft
Then, the publications I have had become side benefits, not the focus. It's not an easy shift, but it's made all the difference.