I think what most successful people do is avoid getting in situation where they have to ask for permission to do things. While there may sometimes be legitimate gate keepers that stop you, be careful not to create a gatekeeper out of people that don't care one way or the other. Just go ahead and do it if you can.

Not creating gatekeepers is good advice.

The sort of meeting described in the article seems custom-made for gatekeeper creation.

If a meeting is about something else, don't raise your irrelevant idea. If a meeting is about your idea, then why are you having it if you haven't fleshed out your idea and already talked individually with a lot of stakeholders?

The only reason I can see for this sort of behavior is a kind of naivete that ascribes immense valuation to ideas, coupled with fear of losing credit if the idea loses association with your name.