Dentist

IIRC, Dentist also have a high suicide rate in relation to other medical professionals. Female Dr and Dentist especially high rates.

Certainly isn't 4 years. You get your undergrad degree and apply to dental school. Then slog through that schooling, pass boards, etc. Almost the same time frame as some MD's
Ive been told med school and dental school are very similar the first. two years.