> arxiv has been running for a long time with much success in certain fields, and hasn't been overwhelmed with nonsense, your characterisation of pre-print servers is poorly calibrated and hyperbolic
I just said that the level of quality control on pre-print servers is extremely low - which it is. They check for very little beyond blatant plagiarism and obvious junk (determined within minutes).
I didn't say that pre-print servers are useless. They're very useful, but it's undeniable that prestigious journals apply an additional filter, which is much more exacting.
If you were to pick a random study from a pre-print server, and a random study from the Lancet, which do you think is more likely to be reliable? Which do you think has undergone more thorough peer-review?
The harm done by bad research in the Lancet is colossal because the results are widely read and disseminated, that is obvious isn't it? Pre-print servers are still quite obscure. Anyway, arxiv has been running for a long time with much success in certain fields, and hasn't been overwhelmed with nonsense, so your characterisation of pre-print servers is poorly calibrated and hyperbolic.
Also the Lancet charges money for its products, and can therefore expect to be held to greater account.