It wasn’t short sighted, it was an acknowledgement that Republicans had no intention of honoring the deal they themselves demanded. If anything it was them finally seeing clearly after years of bad faith by conservatives.The US Senate under Harry Reid short sightedly changed the filibuster rules. No honest person can deny this.
Republicans demanded the filibuster be removed unless it was only used in extraordinary circumstances. They then proceeded to use it in all circumstances, so the terms of the deal were invoked and the filibuster eliminated.
Are you saying Harry Reid should have violated the agreement?