Yes it is, otherwise the whole scientific method falls flat on its face. If you cannot expect that a person will identify valid and invalid ideas, what's the point of doing experiments and having people write up their research? If you cannot expect that a group of people will identify valid and invalid ideas, what's the point of peer review? If you cannot expect that the community of scientists will identify valid and invalid ideas, what's the point of doing science?
On what basis do you, personally, believe that the earth moves around the sun? For me, I believe it because the scientific community accepts it. Do you believe that it is at least possible that the sun really does move around the earth and the scientific community happens to be wrong?
What do you believe the speed of light to be? Did you just read it in a textbook? Who published the textbook? How did they know?
That said, yes, the process of human evaluation is very slow and very much prone to errors. But it fundamentally works.