What is a point of animating the Mind of Steel bad end? A lot of people seem to be under impression that this will make Shirou into some kind of badass that will win the Grail War on his own, while in reality he is most likely will just die an unceremonious death, probably as soon as he steps out of the Church via Archer and/or Rider.
And besides we already have a Mind of Steel scenario, and it is called Fate/zero, and we know how that turned out for everyone involved.
A lot of people seem to be under impression that this will make Shirou into some kind of badass that will win the Grail War on his own
That's because it's exactly what Kirei says and what's implied to happen. Seeing idiot Shirou actually become Kiritsugu is interesting at the very least, even if it's basically the second Fate/Zero.