I really just have no words for how terrible this idea is and how angry it makes me. We could have had an industrial revolution thousands of years ago, massively increasing human welfare, but for a paranoid and secretive thinking that made it impossible to build a real scientific community, test ideas, and find the ones that worked.
These "scientific guild" ideas are the ones that condemned humanity to thousands of years of pointless alchemy while people died of cholera in filthy streets.
To want to return to this medieval mindset is inexcusable. It's ignorant. It's anti-humanism.
Look: any time you have to ask yourself "should we deliberately lie to the public about reality?", take a step back and consider whether you're actually the villain from the history books.
It's The Holy Inquisition, crowdsource edition.
Basically you're telling us that "maybe" you should have the power to censor us. For some values of (you, us).
Maybe not. Definitely not.
(I also think that you're factually wrong in 1)