When it comes to opinions nothing is clear cut. We discuss to compare opinions
Walcott doesnt score goals, hasnt done consistently for 3 seasons now. No point arguing that he has been injured. You cant argue that a knife is sharp, if you cant find where you left it. when he plays he is more miss than hit.
Giroud is 1 dimensional he has no movement. Bony as he showed in Swansea is everything Giroud is and more, he can actually do more than stand in 1 position.
Welbeck is well I dont know what to say.

Squads are relative but our keeper is slightly better than theirs,
Our backlines are comaparable but they have moe depth in CB than us
Midfield they have the 2 Fernandos as DM, we have only Coq
Creatively we have Cazorla and Ozil, while they have Yaya and Silva.

It is not for nothing that most pundits rank them favourites over us.
It may not be clear cut to you but it is pretty obvious to me
Anything however is possible in football