>>104602802>It might be a case of if you tell them they'll act differently and that will change the futureNo doubt, I'm sure that's why he didn't mention that Quill would freak out, because Strange needed that to happen for some reason and they would've tried to prevent it.
Still, it amounts to a "trust me, I'm going to do my thing and it's going to cause us to win because I've planned out my steps 1 million in advance."
Even if he doesn't tell the others what he needs them to do, by looking into the futures of what happens when he tells them things, he can tell them whatever he has to to get them to do what he needs them to do anyway.
Like, if there was a character who is a loose cannon and decides to just do the opposite of whatever order Strange gave him, Strange would see that in the future, and so could instead account for that and give him the opposite order, causing him to do what Strange wanted him to in the first place. And Strange could verify all this by looking into the future of what would happen if he did this, before he did it. It's a guarantee.
What Tony does now may be outside his present control, but using his future vision he would have been capable of seeing what Tony would do in a day, a week, or a month, based on any number of things Strange could have said or done in Tony's presence before he died. There's no reason he couldn't have gamed that in advance. "There was no other way" could have easily meant "That one way we win that I talked about? That was you getting stabbed and me giving up the time stone, trust me. It'll work eventually, I saw it in the future."