It is not nearly so binary. This issue is complex and intertwining - think rocket science where to get more thrust you need more fuel, but adding more fuel adds more weight, so you need even more thrust... that's mere child's play compared to politics.
For one thing, replacing Biden now may help Trump win, but it may also help Trump lose, whereas in contrast NOT replacing Biden now may help Trump lose, or it could help Trump win.
And somehow, we're all back to everything Everything, EVERYthing being all about Trump, all the time.:-( Democracy has had cracks in it forever, especially when mixed with capitalism, and he exposes all of those.
Except that's not the real question, bc he's already said that God Himself could not cause Biden to step down (I'm being literal here). He's doubling, tripling, and whatever more down, digging his heels in and refusing to even consider that option, regardless of who asks.
At this point he is either removed by force - which won't happen - or it's already over.
And either way, the SCOTUS ruling holds firm.
I wish him luck, but I don't expect good things to come. Even if he wins, heck even if he like rigged the election at this point and gave himself a large majority of numbers in the process, the other side won't believe it and there's a goodly chance of an actual civil war, or something along those lines (bad riots or such). Or maybe I'm full of shit, but it bothers me so much that everything that I say sounds "fatalistic" to my own inner ear - except that word means closing your eyes to the truth and choosing to believe only the worst, whereas this is my attempt to be realistic with eyes wide open!? I am saying that it does not bode well that this seems a realistic possibility rather than hyperbolic exaggeration of words for like comedic effect:-(.
Once again, there's like ~11% of the country who is die-hard Trump red maga, another ~11% Biden blue maga, and the LARGE majority of us in the middle don't matter in the slightest as we get caught between these two extremes (Russian oligarchy encroachment vs. American oligarchy establishment, tbf the latter cares far more about the common folk, but is really bad at showing that).