Obedience doesn't always equate enthusiasm. Jesus asked for another option. He was looking for plan B. And yet... he was willing to do whatever was necessary according to the will of God. Jesus was faithful first, and willing to submit his own desires to God's desires.
And so we pray for God to change our hearts, but we also have to discern sometimes what God's will is, even if our hearts aren't leading us in the same direction. Faithfulness and obedience to the call of God matters more.
This passage always makes me think of CS Lewis, who notes that the door to hell is locked from the inside. He wrote that in the end, there will be two types of people -- those who are willing to say to God, Thy will be done, and those to whom God will ultimately say, thy will be done.
Whose will shall we follow today?