Well, you sir, are clearly not getting the point that you need to have good options and not just options to change a game. Had Zlatan not been the genius that he is, you will not be here telling me how bringing Rooney on was the best thing (as opposed to just being another option) because up to that point it was a shambolic decision. Bringing on a player at half time who looked like he'd been playing for 100 hours before the sub against a team that thrives in their high pressing game was silly. Any sub at half time, with such a reputation should at least be as sharp and as fit as those that were already on the pitch.
The point I believe
@Devil may care was trying to make to which I agree was that as long as we hold on to players who are only good for just being "another option" in case things aren't going well, we shouldn't expect to progress forward. If we want to win things we should be able to have players coming off the bench that we can be happy to say it wouldn't have been the worst thing had they started. If Rooney came on for the opposition, I don't I'd be that fussed as opposed to a Rashford.