Pushing out something completely broken that doesn't do what it's supposed to is definitely not going to work (duh!). Pushing out an app that solves the problem of managing shopping lists that has a bug where it doesn't work given a particular set of circumstances will still lead to many people using it if the users don't have any alternatives and it's better than using a piece of paper.
Software quality is important to companies because it means that they can spend more time building features instead of fighting fires, and because low quality represents a threat that a competitor could launch a better, less buggy app. Users mostly don't care so long as the app works well enough to do what they need it to do (but they're not dumb, they'll still pick the least buggy option if there are alternatives..).
A high level of quality in software is not important unless you're entering an already well-served market. I wish it was.
The idea is that it does what it says on the tin, without fanfare, robustly, usably, accessibly, localizably, and dependably; providing a user experience that gets out of the way of the user, in a manner that does not surprise the user (even "good" surprises can be an issue. Boring software can be just what the doctor ordered).
In my book, that's the definition of "quality."
I'm working on an application that has been over a year in the making. Its functionality is something that I could have popped out in a month, but making sure of the Quality of the app has necessitated that I spend a great deal more time, "polishing the fenders."
If this were a commercial app (it isn't), then it would have been unbearably expensive for a startup.
I tend to write test harnesses in a day or two, that have similar levels of functionality to this application.
High Quality is significantly more expensive than even "decent, but lesser" quality.
I consider everything I do, "engineering." Been doing that, all my adult life.
Feel free to look at the stuff I do (I link to it in my HN profile). The app I'm working on isn't there (yet), but a number of its components are. It's still "under wraps."
It's not exactly a "one-man show," but I'm the chief architect, and the only one developing one of the three servers the app uses (I was also the original architect for another server, that is now being run by a different open-source team), I am also the only one developing the native iOS application. I may be writing some adjunct apps, once the main one has been released (like Watch, Mac and TV apps).
But we're a team. It's a 501(c)(3), with a mission to Serve a specific demographic. We have the advantage of being intimately familiar with the demographic. So far, we haven't had to shell out much. If they decide to write an Android version, then it may take some extra dosh. The good news is, the app is in "constant ship" state, so asking for funding is fairly straightforward. We just need to loop the person into the TestFlight group, and Bjørn Stronginthearm is your uncle.