That's a misinterpretation:
> anyone can
(Of course nothing stops them, but I don't think that's your point.)
> anyone can make an informed critique and self-evaluation of it, with no necessity of depending on a priesthood to interpret it.
Science is specifically not the wisdom of the crowds - that is pre-scientific. It is the wisdom of emprical facts, which are usually so complex and voluminous that it takes great expertise to understand and interpret them. Science is not democratic - your opinion is worthless and does not deserve consideration unless you can demonstrate otherwise.
You don't have to be in the priesthood, but it's tough to have the expertise otherwise, and then tough to stay outside the priesthood.
"'In matters of science,' Galileo wrote, 'the authority of thousands is not worth the humble reasoning of one single person.'" ("In questioni di scienza L'autorità di mille non vale l'umile ragionare di un singolo." The source was not able to verfy its provenance, however.)
HN is democratic, however.