What an awesome set of examples, and I had to laugh just watching them. I agree that it's hard to hear songs that you love get handled badly. It's just like when someone remakes your favorite films. I'd be incredibly pissed off the day a Hollywood studio greenlights a remake of 2001 or Blade Runner.
Personally, I wish there were a lot less cover songs and tribute bands out there. It's great to have the influence, but it would be a better use of your time and effort to put that influence into an original song.
This dolphin band in the original post clearly has some sort of style - that indie-rock, quaint, jazzy, indescribable thing. They aren't my cup of tea, but I think they could go on to do well with original songs with their minimal setup rather than making covers of all these New Order songs. So, maybe they are bad as a tribute band, but probably better going on with their own material.
Of course, everyone learns to play music by playing other people's songs - that's just how learning happens. I suppose it's just expected that on a New Order board, you're going to find the covers posted left, right and center.