It is not just Bitcoin and technology. The sad truth is there will always be crime. If criminals think that they can get away with it and make money from some new invention, they will use it to commit crime.
You are absolutely right. It is foolish to blame Bitcoin for the crimes. If Bitcoin was not there, then the criminals might have used some other form of anonymous payment. And if I am not wrong, Bitcoin is rapidly losing its value among the criminals. Now they are preferring completely anonymous currencies such as Zcash and Monero over Bitcoin.