Quality assurance is important whether you do that via humans or code, but the thing that always bothered me about Q&A was that the ones I worked with were mind

Quality assurance is important whether you do that via humans or code, but the thing that always bothered me about Q&A was that the ones I worked with were mindless people simply looking at the feature request and the functionality on the page and comparing the two without any thought towards the actual product, business, or user. And in that system, the developer is completely removed from the product and is just another factory worker. The closer engineers can be to users (with design to translate obviously) the better for everyone.