If learning about what can happen in a coal mine upsets you to the point you cannot sleep at night, stop learning about it and do not become a miner.

If learning about what can happen to a soldier in combat upsets you the point you cannot sleep at night, and the country is not at war, perhaps this duty should be left to others, although it is a necessary duty that someone must take on.

If learning about a new virus like Covid-19 upsets you to the point you cannot carry out other life duties, concentrate on a necessary duty that you can gain skill at.

The MD in the article is not arguing that medical students STOP LEARNING.
This MD is discussing a phase of high stress learning that can even highly motivated and capable people can fall into temporarily.
The MD points out that this phase passes in time.

Soldiers in training are put under stress on purpose.

Medical students in training are put under stress on purpose,

Do not read these short descriptions of the
stressful effort worldwide to learn more treatments for Covid-19
if it is “the straw that breaks the camel’s back”
due to other stresses.