Which ones? This one in particular is special? See the problem? I still need to trust some authority on which ones to spend time on.
I think the parent was implying that we should try to avoid bias by reading it ourselves, but I still need to trust someone, so still getting biased feedback. "reading the paper" does not remove the bias, because I still need to narrow it down to read only specific ones.
There are thousands of subjects with thousands of papers. To read them all would take thousands of years.
The reason we use summaries is because there is no time to be an expert at everything.