Why? Which youngsters?
I hate this argument "just throw in the youngsters". From a footballing perspective, at least Arnautovic brings in PL predigree. Even at his age he could make 33 league appearances last season. I think he's a player that can bury a couple of Rashford chances v Brighton.
I think we need to take a step back and ask 1) is there any top talented young striker who is available for us, and 2) Does Arnautovic bring dependable performances as a striker for a reasonable fee.
It needs to be that simple at this stage. There is so much complexity surrounding us - Ronaldo, FdJ, the left back conundrum, etc. I think a very simple solution for this season at least would be beneficial for us. Ten Hag if I'm not mistaken got a fair bit of stick for buying Haller, he didn't give a toss and Haller hit 20+ goals didn't he?