[biot]

On the flip side, an investor puts money into funding an idea which they (ought to) know has a 90% chance of not working out. I don't see anything morally or ethically wrong with saying "I/we gave it our best, but the idea didn't pan out" and returning any leftover funds, if any, before completely flushing that idea (discarding all assets associated with it), putting your thinking cap on, and looking for the next opportunity. I generally don't see a problem with starting over if you're going from an "Uber for Drones" idea to a "Custom CNC Furniture" idea, for example.

Of course, that's a completely different scenario from simply evolving the idea in a different direction but still keeping the core; in that case, I agree with your point of view. For example, I do see a problem if you're going from a "Custom CNC Furniture" idea to a "Custom CNC Cycling Parts" idea. It would be pretty shady to screw over your initial investors in that scenario. It also might be actionable by the original investors if you reuse any assets you developed using their funds.