People who voted CPU-only haven't been around long enough or aren't tech savvy enough to appreciate the power of botnets.
I don't have a GPU farm so I'd love CPU only to be viable and fair for the masses, but unless you have some genius innovation to nullify botnets, its a pipe dream.
All we can do is fire up some cloud servers for a few hours and hope to do battle with the botnets until it becomes unrealistic. That's not particularly fair for anyone with a single CPU home computer though..
Yes, someone gets it.
I understand that those without the tech background might think it's a big deal to create a botnet. Unfortunately, it's quite common and fairly straight forward to create:
http://readwrite.com/2013/07/31/how-to-build-a-botnet-in-15-minutes#awesm=~ouUMz3fuTxcXmBBotnets will own this coin, period.