Because even though the perception is that you have absolute power to do whatever you want the reality is you don't have that power sometimes if you had a really free hand if you really did what you wanted to do
[まなこ, manako] (n) (1) eye; eyeball; (2) (arch) pupil and (dark) iris of the eye; (3) (arch) insight; perceptivity; power of observation; (4) (arch) look; field of vision; (5) (arch) core; center; centre; essence; (P)#3813