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.
Another. Industries that are oriented towards tradeshow or holiday launches. It ain't like they're going to move NAB or Christmas just for you. Inevitable feature pruning occurs.
Having said that, I wonder how many of the great fortunes have been built on horrid, half-finished websites and associated software that were all about being first out of the gate and heavy marketing.
An interesting subcase is software that is difficult or impossible to update vs. immovable deadlines. I guess in a world that consists entirely of one silly internet surveillance marketing company after another is doesn't really matter much anymore.