I would agree with you there. However, our devotion will be reflected in our actions.
We can say we love our parents as much as we want, but if we do not help them or show them care, or give them some of our quality time, then they are vain words.
When we love God with all our hearts, minds, and souls, we will treat His day--his date with us--the Sabbath--as God would have us. It is sanctified. The word "sanctified" means "set aside for holy use".
So the Sabbath is a day for God's people to set aside for Holy use, and give Him the quality time that He deserves without so many distracting burdens of every day cares.
Of course, we will always be burdened down by the cares of this life. Things happen. Accidents happen. We spill milk on the Sabbath and we have to clean it up. Someone falls in a ditch, and we have to take them to the hospital. All these things are understandable to God. But God knows that at least we're not willfully going out of our way to conduct business on the Sabbath, sell, buy, and go to amusement parks. Also, our conversations will not be about whether our muffler in our car got replaced, and what brand of tires we have. The focus will be concentrated to the things of God, His handiworks, His creation, and we will dedicate that day to helping the poor, the sick, and being a blessing to those around us.
We will celebrate the day to the best of our abilities.