Why stop at forcing the last move? Why not force the last 20 moves, because a 800 rated player will see the same line as a 2500 player, or how about "calling in a friend" aka Stockfish which automatically plays out the situation? I think your ideas are good but you're not seeing the full potential of your great ideas.
Your "slippery slope" argument is fallacious, in that it demonstrates flaws that need never exist in the original suggestion.
I'm not suggesting that having the computer play forced moves is a good thing, but your rebuttal is silly.
Think your rebuttal fails at the fact that you took it seriously, definitely was taking the piss. Terrible idea by OP, get mad.
You said peer review, which I presume meant other users. What you're proposing is only if the result is "Blah-blah won, game abandoned"?