Of course that's a possibility. It could just be Fowler wanting to move on and the Ducks accommodating him because it made sense for them, too.
But it's just a bit strange that a guy who's been a lifelong Duck - maybe not a fan favorite, but certainly a guy well-respected by (most) fans - has no desire to play 1,000 games with the team. The Ducks would have, presumably, made a big deal out of this. They could have sent him off after celebrating him with the well wishes and goodwill of the organization, feting him as he deserves. If Fowler wanted that, I'm sure they would have done it. It was like three more weeks.
So either Fowler didn't want it or he did and the organization shipped him out anyway (which is less likely since Fowler had to waive his NTC to move). By itself, maybe you take it as just business. But there is so much smoke around the organization - Murray was abusive, Verbeek is a hard negotiator and hard to work for, Cronin makes players hate playing for them, and the team continues to lose. It's difficult not to see this as part of that pattern - a longtime Duck is so tired of the organization he'd rather get traded 3 weeks before a huge milestone.