Before you give up, are you sure that they won't polish out with the right tools and products?
Did a detailer or a trusted body shop tell you that the scratches go completely through the clearcoat? Are the scratches all the way to the metal or will they catch your fingernail? Did you try to polish them out, and if so, what steps and products did you try?
Some defects that don't require repainting are yet so severe that only someone with a lot of experience and the right tools and products can get them buffed out or at least reduced to an acceptable level. Hiring a detailer pro is a lot cheaper than repainting, so you want to make sure that repainting is your only option.
Also, repainting the entire car may not be necessary. I suggest that you go over the car panel by panel with a fine toothed comb and determine which panels have scratches that will catch your fingernail, which have scratches that go all the way to the metal and which have scratches that are neither. Those panels that have neither likely can be buffed out using the proper techniques.
It might be worth it to take the car to a professional detailer with verifiable experience at reconditioning car finishes. The couple of hundred dollars spent getting your current paint to it's maximum potential could easily offset the cost of unnecessarily painting panels.