>>109297799Nah, if they went back to the moment Thor was still smack talking Thanos, future Thor could come out nowhere like at the start of Endgame and cut off Thanos arm/head. Then they just borrow the stones from there to fix their timeline and return it easily.
In their defense, I think they went for the time heist since it "seemed" like it had the lowest risks for them, since most of the stones were easy pickings during those times. There's a case that they fuck up going back to that moment between Thor and Thanos and get themselves killed or even lead that Thanos to do a total remake like the one in Endgame planned when he learned of them going back in time.