[atleastoptimal]

Imo, it's because swearing indicates frustration, and frustration indicates effort.

[hinkley]

Or as Good to Great calls it, "Confronting the brutal facts".

"This is bullshit" is an important realization. If you can't say it, then things will stay miserable.

[throwaway8689]

So I need to use more profanity at work, then ask for a raise?

(But I concede that effort and productivity are not the same thing.)