Theyāre definitely fallible, we just donāt have the batting to make it count atm - our top players arenāt in their best form, and our other players arenāt really contributing reliably enough. If Root was in the form Smith is in, Cook/Bairstow/Ali could start getting regular 50s, and 1 or 2 of the new guys could chip in with some runs, then weād have every chance, but they just canāt bring it all at the same time.
For a score of 400, something like - 100-125 from top batsman; 150-200 from the other 3; 75-100 from the lesser batsmen; 0-25 from tail. That seems well beyond us atm, and going to the WACA isnāt the place to solve that.