That's right: Here I will do a example:
You're using a Tyranitar with 4% HP and your foe has a Blissey with 15% HP.
You have a Staraptor with 23% HP, but your foe used SR and Switching would be useless.
Tyranitar has SR, useless; Pursuit, no PP left; Crunch, disabled; and Triple Edge.
Anyways you're going to die, Triple Edge's massive power would faint her and with Staraptor left you'll win.