No, you're missing the point. You don't know that the crypto was calculated properly, because you are not going to be calculating the crypto by hand. Prove - in the voting booth - that someone hasn't changed the software to give you the wrong crypto token.

> If you have a vote receipt it does not imply you can prove or disprove how you voted, but it does allow you to verify that your vote was included in the tally.

Do you not see that this is is a contradiction? Someone coercing you simply demands that verification.

"Bring your verification receipt if you want to keep your job."

> HTTPS and the green-lock-thingy

TLS doesn't rely on the public understanding it for legitimacy. The public doesn't care about how it works; they care about if it's a reliable security feature. Legitimacy is lost if there are too many public failures.

Voting requires an understanding how the winner was decided. Your proposal will never be accepted if it is, in the eyes of the general public, a black box you submit your vote into that is only interpreted by a priesthood that they have to trust to interpret the votes. Adding up votes is understandable, but homomorphic encryption might as well be black magic.

This understanding is more important than ever, because we are currently experiencing a revolt against technocracy. Brexit and Trump are aspects of this revolt. If you think you can get the population to accept a voting protocol they don't understand, then you haven't been paying attention to the current political climate.