You're right, and it seems even more bullshit from experience... I was half-decent at both comics and animation, initially really wanting to do animation- but made myself learn comics more
specifically because it was comparatively easier and less time consuming to do than somehow animating all my ideas as a single person.
(comics and cartoons are both absolutely ridiculous mediums in terms of process, but I think in the end, comics are probably the less-ridiculous of the two.)
Surprisingly enough, I'm guessing not everyone has enough industry connections and resources to make it so that their courses of action are either "become the creator/director of an animated pilot" or "hire a team to make comics for me" (+ some unspecified secret third option), instead of... Anything involving doing the bulk of the work on your own. Boggles the mind, really.