My assumption is that self publishing allows great freedom for your story to deviate from standard publisher-preferred lengths.
I was wondering if there are strong opinions on the matter that I'm clueless about.
Great question. My experience with self-publishing was once 10 years ago (where I did a traditional printing of 3,000 hardcover books) and then again 5 years ago (where I did POD through lulu.com).
The answer to your question is very simply...yes. Self publishing means you have the whole kit and caboodle, everything. The length, the editing, the cover, the marketing, the printing (whichever form you use) - all of it. All of the highs, lows, and in-betweens all belong to YOU!!!
Your story can be as long or as short as you want it to be. With the technological advancements of today (ebook, etc.) that is a great blessing and makes it easier, quicker and faster to self-pub.
But one thing I would caution - there is a trap that too many taking the self-pub route (whichever it may be) follow...don't publish your work before it's ready. Just because you can publish it yourself doesn't mean it's ready to be published. Write, edit, revise. The do it again! Don't let the temptation of a self-publishing payday force you to publish your work before it's ready.
I admire anyone who wants to self-publish, but the one thing that
should stay consistent between someone who gets picked up by a publisher or does it themself...the story should still be the best it can be before it is made available.