I think it's horse manure. I actually think the dependency on your smartphone is unfortunate in general. I try not to have myself glued to my wireless device when i'm enjoying the parks. And one of the things that my wife and I are always commenting on is parents and children ignoring each other and instead paying attention to their phones or iPads. This encourages a loss of interaction and spontaneity of a day at the parks with your family. But it seems like I'll be at a disadvantage if I chose not to use it as well. It's a shame.
As for this particular operating procedure. I think that if an attraction closes while you are holding a FP for it, you should be able to get another FP in addition to the one that you're holding, and the one you're holding be reassigned for another time if the attraction comes back online before the end of the night. If you opted for a certain experience that was supposed to ensure that you got to ride say Space Mountain, and Space Mountain goes down during your window...these rules are pretty much saying "well you're SOL for getting on Space Mountain...but you can choose a different FP for Stitch, Buzz, Indy, or CoP if you'd like...we've gone ahead and expired your current FP for you already..."
The system should be set up for a "Sorry for the inconvenience, we'll try to reschedule this FP for later today, in the meantime, why don't you select an extra FP for another attraction you'd like to experience." This would solve the problem of the "influx of people trying to get on with past FPs once the attraction comes back up" by systematically spreading them out over the remaining operating day.