Was going to comment to say the exact same thing. OP used a paper by medical professionals to poo-poo formal peer review and then used math papers as examples o

Was going to comment to say the exact same thing. OP used a paper by medical professionals to poo-poo formal peer review and then used math papers as examples of successful arxiv papers scrutinized by other scientists. After realizing that, I stopped reading the article then Googled his name, and--surprise, surprise--he's a mathematician. It will work for mathy and theoretical sciences like CS and theoretical physics, but good luck getting experimentalists to review papers for free (or at least without being asked by a journal). I'm not sure whether peer review is necessary in those cases, but the culture around more applied sciences definitely considers peer review more important, even though we routinely post to arxiv anyway.