The same arguments brought up again and again.
It reminds me of the arguments against cars early on. They were dirty, messy, and the roads weren't prepared for them. So, therefore they were doomed.
And then they got cleaner, easier, and we built new roads.
It's the same cycle over and over again. People become concerned and unwelcoming of things they don't understand. I believe once adoption starts at the higher level such as huge corporations and banks, the general public will begin to adopt it too. "Trickle down effect."