Because we don't have farmers who can provide ham or cheese?

Or Britain could simply decide not to bother with any of that - just say that it will then don't. A bit like how every government and the EU really works. It's not like Ireland is going to actually do anything except moan. We've our own pressing issues: the North is not one of them.
There's no 'break a deal, face the wheel': once out of the EU the rules are unenforceable, they are to many who are in the EU at the moment. Apple Tax anyone? Think they paid 81,000 rather than 13 billion - just a slight discrepancy there. Oh well, only Ireland, who cares.

Red and Blue Army!

These problems with paperwork and deliveries are what are called teething problems.
Many posters on here of both political persuasions have or had businesses. They all had teething problems. In time it will be easier and not as problematic. Patience is required as Rome wasnt and all that.

EU beef with full provenance.......last seen breaking down in the 3.20 at Epsom

Responsibility Deficit Disorder is a medical condition. Symptoms include inability to be corrected when wrong, false sense of superiority, desire to share personal info no else cares about, general hubris. It's a medical issue rather than pure arrogance.

To be honest I think there is a case to be made for us being willing to continue with various protections for the Irish agriculutual produce. We are their biggest market and to put it bluntly, it is not in our short, mid or long term interests to see them impovorished. Their politicians, with notable exceptions, are gobs***es of the highest order and like nothing more than prancing around pretending to be Europeans as opposed to just the West Brits they are but much like the white trash cousins you have to invite to family weddings, we do share enough DNA to mean they need special consideration.

Chuck 'em a bone (no pun intended) on issues around meat and so on is my attitude.

"The Party told you to reject the evidence of your eyes and ears. It was their final, most essential command." - 1984 - George Orwell.

Perhaps the EU would be wise to reciprocate.