The OECD suggests [1] that there are about three nurses for every doctor. Complain about doctors as much as you like, but most nurses have lots of useful and relevant practical experience.

(I think most doctors are probably fine. But I don't need to win that argument to deny the 90% claim.)

[1] https://www.oecd-ilibrary.org/docserver/health_glance-2017-5... suggests