He says there are IQ differences between people. Who are these "people" if not men and women? He either means men are smarter or he just randomly went on a tangent.
Let me ask you, when he says there are IQ differences between people, which groups of people do you think he means?
Here (section "Why we are blind"):
"[...] the Left tends to deny science concerning biological differences between people (e.g., IQ and sex differences)"
I don't know how else to read that other than "men are smarter". Is there any other reading?
Some states in US allow you to take a photo of your ballot. This means they can already do the things you mention. But they don't, because it is illegal. It will continue to remain illegal.
If you are very worried about such a scenario, verify that your vote is on the blockchain, then destroy your receipt.
This idea encrypts your ballot with your voter ID + some secret key that you know and creates encrypted data E. It, then, publishes a (E, your ballot) pair. Since only you can decrypt E, others won't know how you vote.