Google certainly had visions for all their products. They just didn't work out, for reasons that became apparent much later (although some people will always claim they "knew" beforehand).
That's the whole point of agility: Release working software often. Make new business decisions based on customer feedback. Remember Google Beta? Not saying it doesn't offload responsibility and potential damage to end users..
No that's not the point. The point of agile development is not to get stuck in the water with long releases and no feedback cycle. It doesn't mean you blindly follow customer feedback and guesses until something works. It means you incrementally release your vision.
tldr: agile tells you how to release, not what to release
Agile Manifesto and IT industry is based on customer vision only. If you are startup CEO, you are customer of the programmers, ie. the one who pays the bills!
