I think people don't realize how much damage multiple hurricanes did to the area a couple summers ago. I agree, it's going to be bad for a while with how open everything will be, but it will all grow back.
Disney could have left the trees standing and then dealt with all the lawsuits when they started falling over onto campers and cars and pets and people :/ None of us really know the extent of the damage except for Disney, but I can pretty much take a strong guess that they're not clearing out the trees just for the heck of it.
Hurricanes are natures way of clearing out areas that they hit. They are MEANT to be cleared out. Normally, by now, the damage the hurricanes had done would have been eradicated by fire, but obviously the Fort isn't going to burn itself.
I mean, the lawnmower tree died because of the hurricanes. Lots of trees it's size were killed because of the amount of bending that occured, and their roots also were probably flooded which didn't help. That's why you still see a lot of the big trees standing, because they were able to survive the hurricanes.
This is the end result of two summers ago, Disney of course cares, which is exactly why they are cutting the trees down to begin with. I wouldn't be surprised to see them begin new plantings within the next few years, especially if we hit a downcycle in hurricanes (which now appears to be happening, at least for the last two years).