Genius didn't work quite the way people who weren't burdened with it thought it did; at no point in his life had Tony simply absorbed the environmental ambiance and been able to divine the future. It must have been a constant whirlwind of confusion and terror to not be able to interpret to basic information people were assaulted with every day, but Tony honestly didn't know what Wanda thought he was seeing that she wasn't. These questions had gone from white noise to 'mommy, why?', and Tony had to roll his eyes. If they were supposed to be brainstorming, she was wasting time because they didn't have any new information. If this was some kind of expression of anxiety, Tony didn't want to hear it, either.
"Why did you become an Avenger? Honestly, why'd you join the team, instead of...?" he asked, the other option left as a shrug. Anything else in the world, really. He knew her reason wasn't going to be like his, or Cap's, or anyone else who had Assembled, but he already anticipated the guilt, and the promise to herself and the people she hurt, and blah blah he knew that story. Intimately. They all had one. But there should have been more to it than that, and maybe her answer would give him some idea of why she could be so frustrating to work with.