That is motivational content, but not economics. Most startups will be noise, even more so than before. The value of being a founder ceases when everyone is a founder, when it becomes universal. You will need customers. Nobody wants to buy re-invented-the-wheel-74.0. It lacks character, it lacks soul. Without it, your product will be nothing but noise in a noisy world.
Official documentations are not always complete. It depends on the diligence of who wrote them and how good they are at writing. Customers and users will always send mails or open tickets to ask this and that about the docs afterwards. Can't rely on just learning or retrieving from the docs. Clarifications by some dev or someone who found a solution/workaround will always be required.
how come MS Teams is still trash when everyone is being so much more productive? Shouldn't MS - sitting at the source - be able to create software wonders like all the weekend warriors using AI?