I'm saying the hole is already patched.
Or rather, the structure had no such hole in the first place. You're mistaking the dome of the roof for a hole in the ceiling.*
Agreed. We can discuss the propriety of the outcome without necessarily requiring that it happen by the same means in every case we're considering.
ETA: I agree that the outcome in this scenario arises from a different process than in the other scenario. I don't agree that the process in the other scenario constitutes "wilful [sic] obstruction".
And if the Senate stops confirming, a wider net for potential Senators can be pursued. Though, we already cast about the widest possible net, so we're in good shape there. The only thing missing right now are Senators looking to get elected on that issue, mainly because it's not an issue for most Americans right now.
You think that might change, and we might start electing Senators who will confirm, sometime between the death of the first SCJ and the death of the ninth?
Perhaps not. Judges can join SCOTUS only by nomination and confirmation. There's no provision anywhere for "promoting" a judge from another court temporarily.
(Technically, SC justices don't even have to be judges, or legal practitioners at all. "Promoting" a lower court judge is functionally and constitutionally no different from "promoting" an HVAC repairman to the court.)
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*Metaphor, not analogy.