Apropos of nothing in particular but many things in general, I am once again urging all aspiring creatives (and others) to learn to follow directions.
No matter how great your query letter or story pitch, if you send it to the wrong email address (or to any email address, if the agent uses QueryTracker), you're out of luck.
If someone wants to commission you, but they can't find your contact information, you're out of luck.
If you use a photo on your book cover or website that needs to be licensed and you didn't pay for it per the terms of the license, you could face legal and financial consequences.
If your editor has informed you about a misspelling, a factual error, or offensive word choice, and you don't fix it, people will read it and react accordingly.
If your story file has nonstandard formatting and you don't check how it converted on Amazon or Draft2Digital, your ebook may turn out unreadable. (You can hire people do to ebook formatting, but you need to understand enough of the principles to find the right person to hire and also to evaluate their work.)
A lot of this stuff can be confusing or counterintuitive, but there are explainers and FAQs and other resources out there. A handful of people either learn some of this stuff from their employers or were lucky enough to attend a class that taught it, but for the most part, we're all self-educated.
It's not that you have some abstract moral duty to Be Competent (things like licensing and paying contractors aside, you don't, so long as people aren't endangered, and publishing isn't exactly life-or-death). But you deserve to share your art in as clear and seamless a fashion as possible. And the only way to do that is to understand how these processes get done.
Doing everything competently isn't a guarantee of success, but success is virtually impossible without doing things correctly (hiring the right person to do it for you counts, but again, you need to understand enough to hire the right person and you need to work with them professionally).
There are very good artists out there who, through a combination of lack of tech-savvy and unwillingness to slow down and seek guidance, are doomed to never find an audience. That's a tragic and unnecessary loss to both them and their potential audience!