> I have never had this happen nor heard of it happening

I've canvassed in New Jersey where one spouse was surprised by the other's party registration, and had two incidences where it broke into an argument in front of me.

> someone demanding to see my vote counts as a felony still in our state

The line between demanding or requiring and politely, but firmly, requesting is legally blurry and practically meaningless.

Agree this is an edge case problem. (I support mailed-in ballots.)

Hypotheticals are valuable when forming policy, because they point directionally to incentives and potential counterfactuals. Nobody has yet had to take arms up against a potential tyrant in the US (claims of the southern states during the civil war aside) but one could argue that the reason such tyranny has never been attempted in the first place is due to the deterrent of the 2nd amendment. Just because we can't point to a concrete example which proves the necessity of the 2nd amendment to prevent such tyranny, doesn't mean it would be a good idea to repeal it on the grounds that we do not know if those hypotheticals would actually manifest. Similarly, having policies for voting which prevent coercion seem sound despite the fact that it's currently unknowable if in the absence of those policies we'd see an electoral impact due to such coercion.