It makes no sense. Literally none. At all.
The logic here is that it would be bad if just 51% of people can override the rights of everyone else ... so instead we're going to use a system where FEWER THAN 51% of people can override the rights of everyone else.
Not making some people's votes count more than others.
That's tyranny of the minority.
They figured states would appoint the electors and the electors would make their own decision — there wouldn't even be a vote.
What is the point of keeping a system that every state decided 200 years ago was so broken they were going to work around it?
But FFS, come up with a better defense of it than "letting fewer than 50% of people elect the president prevents everyone else from being overruled."