So just to spell something out, the inevitable result of a president actually using the power SCOTUS just gave him is either dictatorship, civil war, or both. Democrats don't want either and therefore can't use that power the way that Trump will if reelected.
Yes, it appears to be the case that SCOTUS just said Biden could have Trump (and any other Republican politician he wants) killed. If he did that large-scale political violence would be the result.
The One Ring can only be used for evil, and any attempt to use it will only make Sauron stronger.
The only thing a good person can do with the One Ring is destroy it.
I'm just some guy, but I think you're right. It's legitimately a good thing for everyone that Biden publicly committed to not abusing the office in the way the SC said was fine.