//It doesn't have to talk the whole package.//
NI has been afforded a special status following the Brexit Withdrawal Agreement. If the UK insisted on full access to the Single Market it would be obliged to take “the full package” (i.e. the four “fundamental freedoms”) in the same way that Norway is:
https://www.norway.no/en/missions/eu/areas-of-cooperation/the-eea-agreement/
“It [the agreement] guarantees the EU Single Market's four freedoms, as well as non-discrimination and equal rules of competition throughout the EEA area.”
// NI is a part of the UK and should be treated the same as the rest of the country,//
I agree absolutely. The NI Protocol is a disgrace and should never have been signed. It conflicts with the Act of Union, and leaves NI citizens subject to legislation over which they have no control. I know that these and other objections have been quietly brushed aside by the UK government and those decisions were considered and dismissed by the High Court, ruling that the government has the authority to take these actions. Whether they have or not is immaterial. They should not have done so. In their eagerness to help the EU protect its single market it has destroyed that of the UK. This is leaving aside the almost psychotic nature which the EU has imposed the agreement where more than 20% of all customs checks being made on goods arriving in the EU are made on goods arriving in NI from GB.
There are plenty of ways this situation could have been avoided if the UK was dealing with a pragmatic trading partner. But it isn’t. It’s dealing with an intransigent bureaucratic behemoth which seeks to punish a recalcitrant UK for leaving its sphere. The entire Protocol needs to be ditched and the EU left to devise ways to protect its border.