For doctors in the US I think the limit is more artificial than that: a cap on how many med school seats are allowed.
The captive audience after some (mostly) arbitrary grinding,
(not being drawn to serve the niche by any particular talent or interest besides $),
is the comparison being drawn.
The captive audience after some (mostly) arbitrary grinding,
(not being drawn to serve the niche by any particular talent or interest besides $),
is the comparison being drawn.