Your vote for president has zero power outside of your state. Your vote informs your state’s electoral representative as to who to vote for.
States elect a president as the leader of the executive branch, a federal role, which affects relationships between a federation of states. Federal government’s role is supposed to be limited to managing the relationships between states.
It’s not a popular vote. Never has been, and would be inappropriate to make it so. Basic civics.
There’s way too much attention paid to the office of president, when there are ~500 other federal politicians who are ignored by doing so.