Very true, but Obama doesn't care. Suppose the parliamentarian rules that the cadillac change busts the budget, but Biden overrules. Can a VP be impeached for such an act, which seems illegal?
I read an interview with the parliamentarian that Trent Lott fired back in 2001. He said, essentially, that we're in uncharted waters. The reporter was trying to get him to answer a bunch of hypotheticals, but he said it's really impossible to predict with any certainty what will happen because this Obamacare is so far removed from what the intended purposes of Reconciliation were.
I've noticed that his words have been cherry-picked by both the left and the right, each saying that this guy supports their position. He really doesn't
With respect to Biden's impeachment, it's an interesting question. The Reconciliation process is codified in law as is the so-called Byrd Rule (2 U.S.C. § 644). Having said that, the law refers to Congressional rules, which can be changed at anytime, so it becomes confusing. Furthermore, you'd actually have to find enough votes to impeach in the House, and that unlikely even if the GOP takes back the House in the fall.