This is how I see agile too. With it’s links to lean, it’s about minimising waste by minimising work in progress. Since the biggest waste is building something no-one wants, getting a small increment into the hands of a user/customer as soon as possible is key.

The problem, in my experience, is many development contracts are still structured in such a way that this becomes too difficult. Management fearing early exposure to the customer will lead to scope creep and cost growth.