Another article lists the author, Gregory Lewis, as a practicing MD in the UK. So he didn't forgo his medical career. Probably he was already well into it by th

Another article lists the author, Gregory Lewis, as a practicing MD in the UK. So he didn't forgo his medical career. Probably he was already well into it by the time he went through these numbers. https://80000hours.org/2015/07/if-you-want-to-save-lives-should-you-study-medicine-probably-not/ https://80000hours.org/2015/07/if-you-want-to-save-lives-sho... As for impact, the entire site is about advising people on how to have the greatest impact, which they calculate using economic arguments. That's how they come up with those careers which they think will contribute the most. What are your concerns about they way they're doing it?