When would it ever be beneficial to promote a pan to a bishop or rook?

When would it ever be beneficial to promote a pan to a bishop or rook?
I would promote it to a wok or even a microwave oven.

If i’m correct (which i very well might not be) then who decided to add the ability to promote to bishops and rooks?
This was a game from my drunk May two four long weekend. Black to move.
https://www.chess.com/game/live/46395010183
If i’m correct (which i very well might not be) then who decided to add the ability to promote to bishops and rooks?