Zoomed in photos never tell the whole story. I bet if you asked, 90% of Disney fans don't even realize there are several islands in the middle of that lagoon, "blocking the view." It's a massive body of water for a theme park. These barges, are not.
They're not so much ruining the view, as they are changing it slightly. The daytime fountains are meant to make a small eyesore a pretty part of the landscape also, so whatevs. Not sure this is the hill I'm ready to die on.
Seeing a photo without zoom puts into perspective for me: