Why Is the Rook so Short?

never heard that song before. must be old. its pretty good. thx bishypoo ♥ !
one a my brothers chickens died y-day. it was like 7 y.o. im so sad cuz it was my favorite...by FAR. it was a chinese cochin. a white banty frillback. i found this song on you tube last nite & played it as i sat there w/ my brother. its old too but it fit perfectly.
https://www.youtube.com/watch?v=1Cin0QzuEss

The rook represents a castle. Castles are far taller than kings, queens, bishops and knights in the real world. Why is the rook so short? What king would have such a diminutive castle built? It would make His Highness a laughingstock! And what knight worth his salt would bother protecting a castle shorter than him? If this draws enough responses, I will start a petition.
man, it’s just a game. it’s not the Middle Ages anymore.