Originalism isn't really a standard unless it holds fast to very specific things. If it's pick and choose from older texts, then it's just another way to get to a living document.
BS on originalism but I'll come back to it anyway.
For me, the living document nonsense is the problem. Once the words of the Constitution are tossed into the wastebin of history as the "living document" crowd has done, then we no longer live in a Constitutional Republic because a Constitution that is a "living document" is not Constitution at all. Instead we live in a Judicial Oligarchy.
If we are going to be ruled by people without constraint then I'd rather that those people at least face election every four years than to be ruled by people appointed for life.
I said I'd come back to it so ok, if we take your ridiculous argument as fact then we already do live in a Judicial Oligarchy either way so it makes no difference. In reality, no you can't just pick and choose. The founders had very clear intent in almost all cases:
They wrote the establishment clause because in England Taxes were collected by the state on behalf of a Church that many of them chose not to be members of.
They wrote that the right of the people to keep and bear Arms shall not be infringed because they had experience with a tyrant who tried to disarm them. All tyrants do; Hitler, Stalin, and Mao included.
The dedicated an entire Amendment (the third) to prohibiting the government from putting soldiers up in people's houses. This was specifically because the British had done this.
Either the text of the Constitution has meaning or it is a "living document". If it is a living document then we do NOT live in a Constitutional Republic.