The Court, for once, merely follows the Constitution and should not surprise anyone with knowledge of it. State legislatures could legally run a lottery to determine who the electors are.
There are a couple of relevant points: when the Constitution was written Honor was important to most people and there were NO POLITICAL PARTIES at that time.
Jefferson and Madison created the first party which became the Demon party in an attempt to thwart Hamilton’s influence and control of the Washington administration.
What do you make of this part of Amendment XIV?
But when the right to vote at any election for the choice of electors for President and Vice-President of the United States, Representatives in Congress, the Executive and Judicial officers of a State, or the members of the Legislature thereof, is denied to any of the [male][1] inhabitants of such State, being [twenty-one][2] years of age, and citizens of the United States, or in any way abridged, except for participation in rebellion, or [other crime] [3], the basis of representation therein shall be reduced in the proportion which the number of such male citizens shall bear to the whole number of male citizens [twenty-one][2] years of age in such State.
[1] includes female via Amendment XIX
[2] eighteen via Amendment XXVI
[3] except failure to pay tax via Amendment XXIV
A lottery would constitute an abridgement of rights.