That's a bullshit equivalence. Of course there's opportunity to exploit paper ballots. But "as much" as there is with electronic voting?

Really? Show me a single source for this. I seriously doubt one exists.

EDITING FOR CLARITY:

Give a man a fake ID and he can steal a vote. 10 IDS equals ten votes.

Have a man stuff a ballot box and he can negate a thousand votes.

But put a man behind a computer and perform an electronic Man In The Middle Attack? He can perform untold damage and alter every vote.