Second, their protest is laudable. But their decision was consciously: "the legal department of this $xxx billion company (that spends $xx million maintaining this employment contract template) will bend to my will, or I will {quit OR relent}". If they'd quit? Job well done. If they'd relent? Then why try? You're screaming into a void, and if you didn't recognize this prior to redlining, you have a bad trait for an employee.
All scenarios point to a competent red-liner achieving their desired outcome -- an ethical win in whatever case. Only an incompetent/shortsighted/kneejerk/low-critical-thinking red-liner would achieve an undesired outcome, because they didn't consider the game before playing.