The same could be said for a 3D human character, it's very consistent because it's a 3D model but it's horrible to look at.

Do you notice when Bluey characters are animated from 3D or 2D? The software they use allows to do 2D drawings from 3D animated models.

https://www.celaction.com/en/celaction2d/

I have never seen Bluey but from the software you linked it is clear that it looks 2D because of how inconsistent the character looks at different angles, for example when you rotate the character the mouth changes position, the hands jump from one sprite to another, it's cel shading with a lot of 2D element on top, it works with simple animation but for anime I'm not optimistic.

His point, I believe: artistically interpreting the motion and shape of humans or objects with larger moving parts makes animation look more on-style.

But for "boring" rigid objects, there's less of this advantage; hence, the consistency benefits often are more important.

unless it's Miyazaki films - in which case most humans are intended to be lifeless rigid objects and every machines are to be lifelike animations (/s)

I've seen 3D animation where the people are still quite fluid and not awful to look at. Not as good as 2D animation but still pretty good and more than watchable.

https://www.youtube.com/watch?v=OO9zNw_uHg4

https://www.youtube.com/watch?v=eCc4md8Cuy8