> very high standards
Maybe in the pure STEM subsections but anything to do with humanities is highly subjective and biased.
Even in the hard sciences I find that Wikipedia is a just good starting point: scan the references for the real material. It helps if you have access to real libraries, both physical and digital.
Personally I stopped donating to them when I discovered how difficult it was to correct errors in literally my own family's history; there's always some "editor" sitting there to roll it back in seconds.