I think that’s a bit of a broad generalisation, certain genres are perhaps better suited to AAA titles than others, FPS for example are definitely awash with incredible titles and franchises that indie developers will struggle to compete against.
Arguably indie developers are afforded a larger amount of freedom in terms of pursuing their own interests as they don’t predominately have to navigate the bureaucracy that comes with investors and the market, etc.
Don’t get me wrong there are some truly awful games out there that do make you question what the hell a large team was doing, but it’s unfair to tar them all with the same brush.
These teams produce games that are in all fairness extremely large coordinated exercises, there’s a reason these things take a couple of years to come out.
With the greatest respect to the Banished dev it’s not exactly a massively content rich game (compared to a good standard AAA title), it does what it does, and it does it well. Perhaps that’s all you should demand from a game, but there is so much that can perhaps go unnoticed in a triple A title …
Edit: That’s not to say in any way shape or form that Banished is lacking, I am truly loving the experience.