This is the type of deal I think makes sense.
You have lost all perspective on Fowler. He's not a no. 1 defensemen. So he has looked bad in that role with the ducks, not to mention he's typically had a young/poor partner. And I agree he has his limitations when it comes to physicality and shooting.
But at his worst, Fowler is a solid top 4 d man on a good team. He's at the tail end of his prime and his contract is actually pretty attractive (only 2 years of term at $6.5M, which is the going rate for a top 4 guy). He should be a pretty attractive asset to a contender at the trade deadline (2 playoff runs), should the ducks want to move him.
And just to be clear, he does bring value to the ducks even if he's being played too high in the lineup. Trading him will be a step back in the short term. That might be the right move, but the ducks are a worse team without him. in the short run