I was saying that unlike in the more shonen like stories of the other routes, this isn't as easy as punching someone's lights out to fix the problem, the main cause lies elsewhere. So just "trying something" with no information would be stupid.
And what you're missing is that Shirou is not some normal person that just likes helping people, there is more to it than that, its why he says odd things like "I'm fine being a machine", he struggles to reconcile the pain he STILL suppresses from the fire(in the Fate route when he thinks about his mother and father, he literally just blacks them out, because he is STILL suppressing how painful it was to lose them and survive alone) and why he follows the ideal.
So its weird how people laud his ideal, without understanding Shirou himself, even after seeing all that. The concept is beautiful, but Shirou is still pretty fucked. Its kinda why I disliked Nasu's way of tackling it all endings showing he still needs guidance, but that somehow it just works out via timeskip. That definitely is something that should be shown.
And yes, he has allies. He wouldn't have made it at all if Sakura didn't push herself to have Rider use her NP to get the gang out of the forest and to the church. What happens in HF is that the protags have hangups around and with each other that causes what should be a smooth operation to be anything but.
And yeah, it is obvious given the information you get. Why would a servant who was initially very weak and hostile to you, save you and be much stronger later on? If you didn't know initially, it should have been obvious later on.
And how is it bad for her to fight against Zouken you say? Sakura has parts of him inside her at all times, no hotblooded determination is gonna fix that. That would be bad during a battle to have her power suppressed, drained, or having her organs played with. Kinda distracting I would say.
Because he sees firsthand that he doesn't have anything he can really do, and get smacked down so hard he loses limbs and realizes how easily he can be brushed aside. He does the same foolish things, but this time, they have lasting consequences.
I don't understand why Shirou is suddenly out of options now when the other times he was happy to charge in despite negligible odds of success.
But it isn't as if he wouldn't try anything if he has the right info, he's antsy and always asking questions precisely because this is basically trying to grab shadows with your hands.
You'll see a good example of this in the third movie, where if one piece of critical information was known, a lot of this would be cake, moving straight on to the endgame.