The idea that authors are incapable of editing their own work for publication is one that is prevalent in the indie author community. Writing and publishing advice is pretty much never absolute, but to me, this bit seems to be the least argued against. I expect authors are afraid of coming off as amateur or like they are cheating or snowing readers by not hiring an editor.
Well, it is actually possible to self-edit your book for publication, but what I’ve learned is that it’s never as effective as a professional edit and it’s about the least fun thing you can do.
One reason to self-edit is that you want to get your book out quickly, which is understandable since the Amazon algorithm favors quick publication. But if you’ve just finished your book, do you really want to self-edit the content, then read through it againlooking for grammar and style issues, then go through it againto proofread? I did this with one of my books, and by the time I was done with the copyediting stage, I caved and hired someone to proofread. I was just so damn tired of my own story.
Another reason not to self-edit for publication is that your likelihood of catching mistakes is lower. It will be very hard if not impossible for you to get your book to that 95 percent error free state. There are ways to mitigate this such as stepping away from your manuscript for several weeks or months to mimic fresh eyes on your work or using a program that reads your manuscript to you so that you can listen for mistakes. But the former negates getting your book out quickly, and the latter is not any less tedious than using your eyes to read your book, at least in my experience.
There are some authors who are attempting to create a minimum viable product in order to test the market. In this case, they might make the decision to self-edit. But my recommendation is that you should hire a professional editor unless you are comfortable with the risk of releasing a book which appears badly edited and receives reviews mentioning such (you can always edit it and republish later, but you can’t get rid of these types of reviews unless you sacrifice all your reviews and do a completely new listing for your book).