By 'voice', I take it to mean speech which is covered by Amendment I. Again, it explicitly does not say that the right to vote comes from the Constitution. It simply is not there. Nice distraction for you, though.
"Nice" distraction by you. The sentence just before the one I bolded (to help you find it) remarked how he was shocked that his friends didn't VOTE. He wasn't remarking that his friends didn't exercise some 1st amendment right.
But you go right on ahead taking the author however you want. I still think the piece is moronic, and appears to be informed by an ignorant belief. Your argument doesn't persuade me.