The tweet doesn't say she would adhere to that line of thought, only that if someone did, that is the logical path it would lead down. If anything, at least it shows she's not afraid to say what she thinks. And I think it does show she thinks carefully. You may not agree with her conclusion, but that doesn't mean she's stupid.
I read the first few pages of the paper, and she seems to be making the case that it is harder for an Originist Congress person to support super precedents that may be unconstitutional than it is for a judge. This is because a Congress person is voting based on politics, not law theory or right and wrong. If a judge over turns SS for instance, there will be chaos, not order, so they may rule against their originalist belief to maintain social order. A politician however, they are beholden to the electorate, and their re-election will determine which way they go. Thus legislators may have a harder time maintaining that position.
I don't have time to read it all though, so I could be wrong.