I hope you're right — that's certainly one of the conceptual rationales for sanctions.

Unfortunately, it will probably take a lot of catastrophic economic damage before Putin loses support — as in whole companies going down, life savings destroyed, bankruptcies, loss of homes, hunger, desperation. Think of how difficult it is to overcome your own biases — have you ever changed your mind about something your country did?

Sanctions are horrible especially on this scale, and even those of us who believe they are appropriate have to stay clear-eyed about what happens.