Archers vs outsiders split from unfairly powerful monsters

[Beheld]

and even there the Pit Fiend needs favorable circumstances to be a challenge.

The favorable circumstances of letting a pit fiend exist for more than one round and thus gain access to the environmental manipulation it possesses in its own abilities are pretty much the exact same circumstances that allow wizards to prepare spells.

How often do you whine about wizards preparing spells needing the favorable circumstances of preparing spells?