Well, I gave you cites for as recently as 1960. Give me a cite or two that says the EC must votes a certain way and I will believe you. Otherwise the way things used to be are the way things are today.
It doesn’t matter that technically, the members in the electoral college might toss the votes in the opposite direction of the intent of the voters.
What matters is, when is the last time that a group of electoral college members from any state voted for someone completely different from what the voters of the state intended?
So, yeah, the possibility of the electoral college voting opposite of the voters intent is there. But, when is the last time it happened?
If something like that is tried in current times, and with everybody shouting “disenfranchisement” about the slightest election “infraction” in today’s world, I doubt that one set of electoral college members from any state could get away with voting opposite of what the state’s voters intended. There would be chaos and rioting.