One thing my wife said was that I was making out like she was the "bad guy" for leaving but I said I don't think that at all, I actually agree with her leaving and think it was the right thing to do. She was obviously suffering & felt suffocated and felt like she needed to get out. Leaving was the right thing to do.
Why would you agree to W leaving? That's nuts. You could have validated W with this suggestion:
"I can see how you would feel this way. It must be rough for you and I can understand your need for some space."
See? This shows empathy/compassion without agreeing at all.