It's subtle, but there's a difference between abandoning something because people don't have the problem you're trying to solve and abandoning something because

It's subtle, but there's a difference between abandoning something because people don't have the problem you're trying to solve and abandoning something because people don't think your solution is good. Take your Uber example. If you'd done user interviews pre-Uber, it's uncertain whether anyone would have said "yes I want to call a black car on my phone" or not. But I can pretty much guarantee that people would have said "yes, sometimes I have trouble getting a taxi to come pick me up". User interviews at this stage are about validating the problem, not the solution.