It's a satirical response to a well-known prior paper critiquing Evidence-Based Medicine (EBM) that essentially said "we have no evidence to support the use of

It's a satirical response to a well-known prior paper critiquing Evidence-Based Medicine (EBM) that essentially said "we have no evidence to support the use of parachutes, so we should re-evaluate our use of parachutes", and concluded with a suggestion that people demanding evidence for simple things should themselves participate in a randomized controlled trial of the parachute.