It didn't originally exist in the Senate either, but the worse Vice President we ever had, decided that the Senate had too many rules and got rid of most of them. One of those original rules allowed any senator to call for a vote, even when someone was on the floor speaking.
This rule, called the previous question for some reason, still exists in the House, along with the Hour Rule which limits the time a Representative can spend holding the floor.
So we already have the framework to end the filibuster, but conservatives on both sides of the aisle like it because it means that they can thwart progress.
Of course, when it gets in the way, Republicans quickly carve out an exception for themselves, like they did with Judicial appointments.