I find it often has the opposite problem. High quality, accessibly-written off-line content by experts in the field is synthesised on Wikipedia by someone with

I find it often has the opposite problem. High quality, accessibly-written off-line content by experts in the field is synthesised on Wikipedia by someone with good understanding of the subject, but then other editors delete large swathes of it for not citing every line and replace it with considerably more dubious explanations of the subject sourced to news articles and partisan think tanks which put all their content online.