This argument is dumb.
The argument is not dumb. His Sabbath is a shadow, a rehearsal for His eternal Sabbath and the renewal, the healing of life for His people.
Without His Sabbath, there can be no renewal, without His Sabbath there can be no healing! Take away His Day and there is no need for Him now is there?
It is when we turn from serving Him on His day to doing that which pleases us and our desires of the flesh as I used to do with my desire/lust for Nascar racing, that mankind runs astray from Him.
A world where everyone does what they believe is right in their own eyes leads to a world of corruption. But a world whose heart is set on being one with the Father as the Son is one with the Father, will bring forth the incorruptible fruit of the Father just as the Son did. (Rm 6:8-23, 1Jn 3:1-12)