The first purpose was to create a buffer between population and the selection of a President

The buffer has never been changed because it now protects capital owning elites (a very few who are non-white and/or female).

Don't forget that the 'electors' who are 'elected' are actually party hacks chosen by other party hacks and in many instances are 'unbound': free to vote for anyone they choose.
In sum: NOT ONE COMMON CITIZEN IN THE HISTORY OF THE USA HAS EVER ACTUALLY VOTED FOR THE PRESIDENT.

Please tell your children that when they ask who you voted for.