GPU-minning is the only thing that saved Bitcoin from being overrun by bot-nets. And one of big reasons of Bitcoin growth.
GPU-minning is much more scalable than CPU-minning. And it attracts much more "investors".
So it's neither a mistake nor a bad thing.
I agree. We're talking money! It doesn't have to be fair, it has to be secure! GPU mining is only increasing security and this will not change in the near future. If anything, there should be anti-FPGA and anti-ASIC protocols, but GPU is more than fine!