There's a big difference between an idea that makes it past many filters but you still don't know if it'll work and between a million random ideas that don't have a chance in hell in the first place.

You want to validate your business assumptions sooner rather than later and there's nothing wrong with that. You should also tweak your business based on the real world. Nothing wrong with that. Nothing really that new about that either. Other than that maybe Pivot is the new Agile?