Researchers largely agree that medicine has only increased average life expectancy by a few years

Researchers largely agree that medicine has only increased average life expectancy by a few years. Most gains in life expectancy over the last 100 years have instead occurred due to better nutrition, improved sanitation, increased wealth, and other factors.Doctors are only one part of the medical system, which also relies on nurses and hospital staff, as well as overhead and equipment. The impact of medical interventions is shared between all of these elements.Most importantly, there are already a lot of doctors in the developed world, so if you don’t become a doctor, someone else will be available to perform the most critical procedures. Additional doctors therefore only enable us to carry out procedures that deliver less significant and less certain results. — https://80000hours.org/career-guide/how-much-difference-can-one-person-make/