If I was talking about what the reality is and what the shadow is, yes, I would have it backwards. But what I am talking about, and which you are not grasping, is the law requires a bull to be sacrificed for sin. Jesus is not a bull, yet he is the fulfillment of the law.
When you can understand that, then you'll be able to start to understand how it is not necessary to keep a literal Mosaic Sabbath to satisfy the requirement for Sabbath, but satisfy it nonetheless.
I agree with what you are saying here and I do not know a better way to put it to folks. But, at the same time you have a tilted view when compared to mine.
Bulls were never the fulfillment of the Law of Sin Payment. If they had been the offering would have been permanent when offered the first time and the Law was clear that it was never forever but was to be a recurring event. On the flip side Jesus, the perfect sacrifice, was forever.
There are a full menu of views about the requirements for paying our sin debts. And it is a common practice to equate the payment of our sin debt with a weekly worship service on one particular day.
This comes about from insufficient and/or pointed study. When we look back to Adam, in the Garden, we find God, the Father, strolling in the cool of the day with Adam, fellowshipping. When we look at the Sabbath, we see God at rest, doing nothing!
It is a stretch but I see that we are to worship seven days a week. I also see God as He has taught us of Himself, Omnipotent and that precludes any need for rest but God nothing for no reason. I see a good deal of teaching that, if followed, benefits man greatly. So it is that I see Saturday, Sunday, or for that matter, any day of the week. The Human body was designed to rest.
To rest and to worship God on the sameday seems to me a reasonable thing to do and so it is that I enter into the Corporate Worship, we are called to, on Sunday and by doing so I expand my family responsibilities and Prayer Concerns, just as God wants us to do.
In John 1:1-3 we find that Jesus is not only the God of David, Abraham, Isaac and Jacob, He is the God of all, everyone of us are here because of His creative accomplishments. Not only did He create us, He died on the Cross to pay for our sins but unlike the Bulls, Goats, Sheep and Doves, He rose from the Grave at the beginning of the week.
Jesus instructed the lass from Samaria that people would worship neither at the Temple in Jerusalem nor in Samaria but would worship in truth and in spirit. I find the core of the issue right there for worship services. We must learn to never wait for Saturday or Sunday to worship, we are the Temple of God making every day our own Spiritual Sabbath.
Hope this helps and does not hinder.